Vista - Can't install RC1 build 5600

Hey there, I can't finish Vista installation. My computer meets the hardware
demands and I've also uninstalled softwares that suppose to conlfict Vista
(Nero , Alcohol, etc...) but no luck. I've tried to install through XP itself
or by booting from the DVD. I choose clean install only, not upgrade and I
didn't have Beta 2.
In Win XP he starts copying and expanding files and then restarts the
computer and just show me that green-blue screen and that's it, nothing
happens.
If I try to install from booting tfrom the DVD I don't even get to icopying
and expanding files, I just get the green-blue screen.

Can someone help?
Thanks in advance
Udi