I added the drivers in your 850XT thread.

http://forum.insanelymac.com/index.php?s=&showtopic=78991&view=findpost&p=57412 8

It says that i have to reboot when i restart all the time grey screen and reboot window

that's a kernel panic. try booting with -v and watch the output.

What should i watch for? Its wrong kext ?

what output do you get if you're booting with -v ?

@creative: boot in verbose mode (-v), and then make a picture of your desktop, we have to see the error output!

ok i will reinstall the kexts and then i will report to you

Heres the screen
http://img529.imageshack.us/img529/9531/dscn0907hz7.jpg

any ideas?

Is this the wrong screen or no ideas?

hm maybe the modified kext has conflicts with your X850. I could try it again, but I don't know if the RadeonX1000 is suitable for the X850 at all.