Cod4 instant hook

[cmetrolling]

Hey guys i want to buy cod4 instant hook but i don't have cod4 on steam i have it just normally from the disk to my computer but i don't know if it will work can anyone tell me if it works

[JohnnyWalker]

It works with the Steam version and for sure with the retail version too.

[cmetrolling]

ok thanks im gonna buy it