I'm back again. After lot of trouble I reinstalled Snow I have fixed issue with blue screen after resolution change (using VGA port, not DVI with VGA adapter - HD2600XT olnly works like that) and audio is workong.

Now I have new problems. My WiFi is still not workong properly, and I can not take screenshot (shift+cmd+3 or 4) I hear sound but there isn't any pict on my desktop. Eaven if I use Grub I get blank (white) screenshot.

What .kext to use that my IDE devices work? I have DVD DL RW and it is not workong.