What do you need to know?
The dll for czero is ...steam apps\<e-mail>\condition zero\czero\dlls\mp.dll
Maybe some info from my failed metamod cz port thread will help:
http://forums.bots-united.com/showthread.php?t=1168
some info about mod recognition, linkgame.cpp etc.
I would like to take a look at your source in progress. Maybe I can help with my limited knowledge.