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This Additional Information field contains the following sections
I. What these diskettes do
II. Summary of changes
III. Installation instructions for OS/2 Warp version 4
IV. Installation instructions for OS/2 Warp version 4.51 and 4.52
V. Installation instructions for OS/2 Warp version 3

I. What these diskettes do
ThinkPad OS/2 Warp Version 4 Install Disk 1 Update
The ThinkPad OS/2 Warp Version 4 Install Disk 1 Update is a replacement of OS/2 Warp Version 4 Install Disk 1. This disk fixes the following problems:

• When ThinkPad 600, 600E, 600X, 770, 770E, 770ED, 770X, or 770Z is docked to SelectaDock III and an IDE device in SelectaDock III is assigned to secondary IDE channel, the IDE device is not recognized.
• When ThinkPad 600, 600E, 600X, 770, 770E, 770ED, 770X, or 770Z is docked to SelectaDock I/II, the system with OS/2 Warp Version 4 installed stops in the middle of its start up.
• OS/2 Warp Version 4 cannot be installed on hard disk drives that have over 8.4GB capacity.
• When a certain type of DVD-ROM drive is installed, OS/2 Warp 4 takes a long time to boot.
• When OS/2 Warp 4 is installed in a HPFS partition on ThinkPad T20, T21, or T22, Trap D may occur.
• OS/2 Warp Version 4 cannot be installed on hard disks drives that have over 30GB capacity.
• When VGA or VGA GRADD device driver is selected and installed on ThinkPad T21 SXGA+ (1400 x 1050) resolution model or T22 SXGA+ resolution model, opening DOS full screen command prompt or OS/2 full screen command prompt gets screen blank. If an external monitor is connected, it displays an image correctly.

ThinkPad OS/2 Warp Version 4 Install Disk 2 Update:
The ThinkPad OS/2 Warp Version 4 Install Disk 2 Update is a replacement of OS/2 Warp Version 4 Install Disk 2. This disk fixes the following problem.

• OS/2 Warp V4 installation intermittently fails due to MOUSE$ error.
• When OS/2 Warp 4 is installed in a HPFS partition on ThinkPad T20, T21, T22, Trap D may occur.
• When VGA or VGA GRADD device driver is selected and installed on ThinkPad T21 SXGA+ (1400 x 1050) resolution model or T22 SXGA+ resolution model, opening DOS full screen command prompt or OS/2 full screen command prompt gets screen blank. If an external monitor is connected, it displays an image correctly

II. Summary of changes
OS/2 Warp Version 4 Install Disk 1
Update version 1.00
-(New) COPYFROMFLOPPY=1 added in CONFIG.SYS.
- (Fix) IBM1S506.ADD updated.
Update version 1.01
-(Fix) IBM1S506.ADD updated.
Update version 1.02
-(Fix) IBM1S506.ADD, IBMIDECD.FLT, OS2DASD.DMD updated
Update version 1.04
-(Fix) IBM1S506.ADD, IBMIDECD.FLT, OS2DASD.DMD updated
Update version 1.05
-(New) IBM1S506.ADD updated
-(Fix) SCREEN01.SYS updated
Update version 1.06
-(New) IBM1S506.ADD updated
-(Fix) IBMIDECD.FLT updated
-(Fix) OS2DASD.DMD updated
-(Fix) SCREEN01.SYS updated
-(New) ThinkPad T23 support

OS/2 Warp Version 4 Install Disk 2
Update version 1.00
-(New) DOSCALL1.DLL updated.
Update version 1.01
-(Fix) SCREEN01.SYS, SETVGA.CMD updated
- (New) FIXVGA.CMD
Update version 1.02
-(Fix) SCREEN01.SYS updated
-(Fix) FIXVGA.CMD updated
-(Fix) FIXVGA added
-(Fix) SETVGA.CMD removed 

III. Installation instructions for OS/2 Warp version 4
OS/2 Warp Version 4 comes with three diskettes for installation. These update disks are replacements for Disk 1 and Disk 2.

1. Install OS/2 Warp Version 4 from the original Install Disk.
2. When you are prompted to insert Disk 1, use Install Disk1 Update.
3. When you are prompted to insert Disk 2, use Install Disk2 Update.
4. Continue installing OS/2 Warp Version 4 until you are prompted to restart your computer for the first time.
5. When you are prompted to restart your computer, do not proceed.
6. Press F3 to go to the command prompt screen.
7. At the command prompt screen, type the following command to run the batch file. The batch file is available on Install Disk2 update. A:\FIXVGA.CMD x: where, x: denotes the boot drive of OS/2 Warp Version 4. In other words, the drive letter to which you are installing OS/2 Warp Version 4.
8. Type EXIT and press the Enter key to go back to the previous screen.
9. Remove the diskette from the floppy drive.
10. Press the Enter key to restart your computer.
11. Continue installing OS/2 Warp Version 4.
12. When you complete the installation, open OS/2 command prompt screen.
13. Insert 'Install Disk2 Update' in the floppy drive.
14. At the command prompt screen, type the following command to run the batch file. A:\FIXVGA.CMD x: where, x: denotes the boot drive of OS/2 Warp Version 4.
15. Remove the diskette from the floppy drive.
16. Type EXIT, then press the Enter key to close the command prompt screen.
17. Properly shutdown OS/2 Warp Version 4, and restart your computer.
18. Proceed to install OS/2 Warp Version 4 FixPak and device drivers.

Notes:

• When you install any versions of OS/2 Warp Version 4 Base FixPak and OS/2 Warp Base Device Driver FixPak at version XR_D001, you may be prompted whether you want to replace IBM1S506.ADD module or not. Then choose No to not replace IBM1S506.ADD module or your computer will not be able to identify the IDE controller in ThinkPad Dock. If you accidentally choose Yes and the module is replaced, then copy IBM1S506.ADD module from the 'Install Disk1 Update' to \OS2\BOOT directory of your computer after you complete the FixPak installation.
• It is strongly recommended to run FIXVGA.CMD batch file whenever you change display driver to "VGA" or "VGAGRADD" if your model of ThinkPad computer is ThinkPad T21 SXGA+ (1400 x 1050) resolution model or ThinkPad T22 SXGA+ resolution model.
• With ThinkPad T30 models, OS/2 Warp Version 4.0 may stop on boot showing a Trap screen when you install system memory greater than 512MB in total. Then, follow the steps shown below:
  1. Reduce the total amount of system memory to less than or equal to 512MB
  2. Install OS/2 Warp Version 4
  3. Install OS/2 Warp Version 4 Base FixPak XR_M016 and XR_D002
  4. Install additional amount of system memory on your computer
  5. Install device drivers and applications

IV. Installation instructions for OS/2 Warp version 4.51 and 4.52
For OS/2 Warp Convenience Package Version 4.51 and 4.52, you do not have to use these diskettes. Instead, OS/2 Warp Convenience Package comes with Installation CD, which has the boot capability. First obtain necessary updates from OS/2 Device Driver Pak On-line web site, install OS/2 Warp Convenience Package, and then install updates obtained from OS/2 Device Driver Pak On-line.

Several models of ThinkPad do not support OS/2 Warp Version 4.51 and 4.52
 
When the home page appears, do the following: (The procedure is subject to change without prior notice)

1. If you already read and agreed to the Program License Agreement, click I have read the Program License Agreement and AGREE to its terms, and skip to step 6 below.
2. Otherwise, click I want to read the Program License Agreement.
3. Read the Program License Agreement.
4. Click ACCEPT if you agree to its terms and go to the next page.
5. Click Continue...
6. Click Systems.
7. Click IBM Corporation (IBM PC Company - Mobile Systems - ThinkPad).
8. Click a model name of your ThinkPad computer.
9. Follow the instructions.

Note:
With ThinkPad T30 models, OS/2 Warp Version 4.51 and 4.52 may stop on boot showing a Trap screen when you install system memory greater than 512MB in total. Then, follow the steps shown below:

1. Reduce the total amount of system memory to less than or equal to 512MB
2. Install OS/2 Warp Version 4
3. Install OS/2 Warp Version 4 Base FixPak XR_M016 and XR_D002
4. Install additional amount of system memory on your computer
5. Install device drivers and applications

V. Installation instructions for OS/2 Warp version 3

Several models of ThinkPad do not support OS/2 Warp Version 3
 
When the home page appears, do the following: (The procedure is subject to change without prior notice)

1. If you already read and agreed to the Program License Agreement, click I have read the Program License Agreement and AGREE to its terms, and skip to step 6 below.
2. Otherwise, click I want to read the Program License Agreement.
3. Read the Program License Agreement.
4. Click ACCEPT if you agree to its terms and go to the next page.
5. Click Continue...
6. Click OS/2 Component Updates.
7. ClickInstallation Diskette Updates.
8. Click PIIX Busmaster / >30GB Drive Support.
9. Follow the instructions.