Well..
Go into the directory you installed it in and find COD2.EXE
That should work.
Just find the biggest file in the folder and dbl clix on it.
lol nub. it prolly isnt even an exe. its prolly an ISO that you burn to cd.
search google for isobuster tbh.
it will open pretty much any file (iso, bin, etc)
if its an iso, no need to burn to a cd. just download alcohol 120% and make a virtual drive
winrar will open an iso