OS/2 Warp 4 Upgrade.

The latest fixpacks all include any y2k fixes needed. For other languages than English, you can track down through the FTP directories to your language. If you upgrade OS/2 v4.0 starting from the top down, everything should be fine. You only need the RSU, or the FTP downloads, not both.

OS/2 replacement boot disk's - use warp4iu1.exe and warp4iu2.exe.

Some zip files from IBM will show errors "shrink method unsupported", if this occurs, use the OS/2 PKZIP program as follows:- PKZIP /extract xxxxx.zip.
64Mb of Ram, read this  if you find your PC is limited to only accessing 64Mb of RAM.
Which FixPack should I install.
Upgrade Directory

You only need to install one FixPack, ie, FP14, or FP15, not both. (FP16/FP17 are SWC reserved)
Fixpacks are generally accumulative.

IBM Core OS/2 Fixpack15
IBM have merged Warp 4 and WSeB Operating Systems at the Base level from Warp 4 FP13 onwards.
WSeB is the Server Edition, Warp 4 is the Client version, both now using the same core.
WSeB FixPack 3 DSK images

Enable RSU Software updates
OS/2 Warp v4.0 Fixpack 15 - RSU
OR Warp v4.0 Fixpack 15 - FTP - DSK Files
OR Warp v4.0 Fixpack 15 - FTP - ZIP Files - How to install an RSU from Harddisk
AND
The following are Official kernel fixes from IBM. [26th October 2001]
IBM Warp 4 Fixpack 15 kernel fix
New dump formatter
Security SES Files    (If you installed the Security Module in the install of MCP/ACP/eCS)
UNI WSeB kernel fix
SMP WSeB kernel fix

OR

Use these at your own risk, these are UNSUPPORTED ! [11th August 2005]
Safe on a Pentium Pro machine.
They do not necessarily work with anything prior to FP13, MCP (Merlin Convenience Pack), ACP (Aurora Convenience Pack), or eComStation.
kernel fix Readme
IBM Warp 4.xx kernel fix, only the w4 kernels are safe on 486sx CPU's
Security SES fix    (For use if you installed the Security Module in the install of MCP/ACP/eCS)
New dump formatter
UNI WSeB kernel fix
SMP WSeB kernel fix

OR

Use these at your own risk, these are UNSUPPORTED ! [28th March 2005]
WARNING: Do NOT use this version on a Pentium Pro machine.
They do not necessarily work with anything prior to FP13, MCP (Merlin Convenience Pack), ACP (Aurora Convenience Pack), or eComStation.
kernel fix Readme
IBM Warp 4.xx kernel fix
Security SES fix    (For use if you installed the Security Module in the install of MCP/ACP/eCS)
New dump formatter
UNI WSeB kernel fix
SMP WSeB kernel fix

IBM OS/2 Device Drivers

OS/2 Warp v4.0 Device Fixpack 2 - RSU
OR OS/2 Warp v4.0 Device Fixpack 2 - FTP - DSK Files
OR OS/2 Warp v4.0 Device Fixpack 2 - FTP - ZIP Files
AND, Other Drivers OS/2 Device Driver Online Pak

IBM OS/2 Printer Drivers

OS/2 Warp Printer Drivers.

OS/2 Warp v4.5 Peer Total (IP08414) FTP
OS/2 Warp v4.0 MPTN Total (WR08423)16bit
OS/2 Warp v4.0 MPTN Incremental (WR08425)16bit
TCP/IP v4.0 Incremental Apps (UN_0980) Install after MPTN WR08425
TCP/IP v4.0 Stack - v4.02w

Ians Zip of Apps/Stack Fixpack TCP/IP - v4.02w (2.2Mb)
Download, and then unzip in root directory after you have BOOTED to the command line.
This zip file is to save you manually applying v4.02w Stack and apps from IBM.Read This !!

OS/2 Feature Install Version 1.2.5
Java 1.1.8 for OS/2 Total
Java 1.1.8 for OS/2 Incremental

Netscape Navigator v4.61
Mozilla Products
Products via Mensys, including OpenOffice.
InJoy Dialer
The Graham Utilities for OS/2
PMView
RAR Archiver
WarpZip
Unimaint & FileStar/2
Remember to register your software, this gives people the incentive to maintain development on these great products !!
No one registers, no one will bother !!

OS/2 Warp v4.0 MPTN Total (WR08610)
OS/2 Warp v4.0 MPTN Incremental (WR08620)
OS/2 Warp v4.0 MPTN Router/Denial fix (WR08620T)
OS/2 Warp v4.0 MPTN Incremental(WR08621)
OS/2 Warp v4.0 MPTN Universal (WR08650) Server only

TCP/IP v4.3 provides multi-platform capability, a BSD 4.4-compliant stack, and performance enhancements, RSVP support, Virtual Private Network and IP Security Support, enhancements to the Dynamic IP server and client functions including local and remote server configuration. TCP/IP v4.3 can be downloaded if you have a Software Agreement with IBM.

TCP/IP v4.x Fixes

TCP/IP v4.21/Injoy Fix, Includes the Injoy Dialer fix !!
TCP/IP v4.3/Injoy Fix, Includes the Injoy Dialer fix !!