help with splinter cell 2

[acidhead]

I installed the game and wanted to run it and before it started it told me it had found a cd/dvd emulation prog running.I then stopped clone cd strg,alt,entf and tried again, nothing had changed still the same grey box that its found an emulation prog running.I repeated this 3 or 4 times nothing happened.Then i decided to deinstall clone cd and alcohol and hey presto the game started.Is there a way to play this game even when clone and alc are installed .When yes please help
thx