UpdCD 2.55 fix has been released. This is a fix release which should be installed on top of an existing UpdCD 2.5x installation.
Changes since version 2.54:
new: added support for OdinGUI (Odin addon)
new: win32k.sys will not be activated if os2krnl.sym is not present
new: Mozilla/FireFox addon installation script cleans up previous version
fix: when selecting RSJ, boot emulation method should be set
fix: updated memboot to version 2006.01.23 because of Warp 4 boot problem
UpdCD can be used to create an updated OS/2 Warp 3/4, WSeB, CP 1/2 or eCS 1.x installation CD-ROM.
Source: