Here's a link to the English Language game manual :
http://forums.steampowered.com/forums/showthread.php?t=1145229
This should be Steam / GSC's job but fortunately a few people have stepped in to sort the steam users out.
Tip for the very beginning of the game with the crappy AK47 you get. I found it's impossible to kill with it on auto, press the '0' key to switch it to 1 shot at a time then click it quickly & you can actually kill things. Of course, replace/ upgrade ASAP.
@ Stonedofmoo The difference in this game is that most groups of human enemies are not automatically hostile unless you start on them. This changes the emphasis, with mutants being more of a threat most of the time. I found it played great on 'veteren', 'stalker' is perhaps a bit easier than on previous games in the series .
Oh & it still randomly stutters now & then, when travelling rather than in combat, I think its not that great at streaming, it's still basically built on the same ancient engine with all the great new stuff bolted on.
But what a cool game & really quite far ahead of the previous ones in the series in my opinion.