Soldier of Fortune 2: Double Helix No-Cd patch
 

I have no idea how to make it work. Can somebody help me ?

Have you read the info file included in the patch?!

There was none to my knowledge, for the no-cd and blood fix... I have one of these no gore versions that came with one of my applications for my pc.

You haven't told us exactly which no-CD patch or blood fix you're trying to use. Anyway, I've downloaded both "SoF 2 v1.03 (Gold Edition) No-CD/Blood/Fixed EXE" patches, by Darknezz and Death. One of them has an info file (read it!).

Both contain a new SoF2.exe only, which you have to copy to the game installation directory, overwriting the original executable (make a backup beforehands!).