Someone here had posted the link to S.T.A.L.K.E.R. Complete mod, but I can not remember who it was at this point (sorry). If you're not familiar with it, it does squash a lot of the bugs inherent to the game series and improves visual & sound quality. It wasn't until I installed the mod that I played through both SOC and CS; CoP is still waiting for me. Anyway, I highly recommend it as well if youíre not familiar with and/or havenít tried it.