I didn't make it!
i could install the game, it runs perfectly, but i just don't know how to play online... besides, i don't know any server to play.
there are instructions in the Manual for Multiplyer details.
But essentially all you do is run COD2MP_s.exe and go to "Join Game". Set your connection details up (Lan/Cable/DSL), set connection type (Internet), chose a gametype (TDM, DM, CTF, SD or HQ), and click 'Refresh'.
Pick a server that suits you (low pings are best), and doubl click on it, and you will connect to it.