There's 3 different S.T.A.L.K.E.R. games, I got 2 of them: Clear Sky and Shadow of Chernobyl.
Can you tell me on what game you're applying this mod?
Or you're doing it to have some traffic on your website???
Cuz I didn't find a link on your page.
[Edited by B4Marc, 4/28/2014 1:56:33 AM]
It's standalone. No previous install required
www.moddb.com/mods/lost-alpha/downloads
Cheers