Some retails do appear to be different versions. I have a European Version and its sub 1.7.5.1. Its more like 1.7.4.x
I tried to download a patch, but I could only find one to set the game to 1.7.5.2 and the funny bit is that there isn't even a crack or anything for that version out there.
Fortunatelly the ammo can be froze/altered with TSearch. There is no need for health cheat if u r cautious enough.
--------------------------------------------------------------------------- "(Laugh) I never met my brother, until the day he killed me. (Sigh) We are a... complicated family. Wouldn't you agree?" - Paxton Fettel