For OS/2 Warp 4, the best way to get to the latest free level(s) is:

1. Install OS/2 v4 FixPak 15 (XR_M015).
2. Install Device Driver FixPak 2 (XR_D002).
3. Install MPTS version 5.4 (WR_8610) - full product install.
4. Install MPTS v5.5 update (XR_8621) - FixPak.  MAKE SURE YOU READ THE
   INCLUDED README.TCP BEFORE INSTALLING, and follow the instructions
   regarding TCPCOEX.
5. Install TCP/IP v4.0 FixPak UN_0980.
6. Install LAN Services (Peer v4) FixPak IP_8414.
7. Hunt down OS/2 kernel 14.103a_W4 (dated 2005-03-18) and install the
   updated OS2KRNL, OS2LDR, and OS2DUMP, as well as the dump formatter
   files.  Optional, but recommended.


-- 
Alex Taylor                                        
http://www.cs-club.org/~alex