Crossfire doesnīt work on Windows 8 consumer preview.
Xtrap gives OS error.
And you arenīt really smart on installing an beta version of an OS on your PC, if you are lucky it wonīt give a fatal error till 01/02/2013 ( When the beta ends).
Personally i tested on a virtual machine and i got tons of Blue screens of death.
I recomend you to reinstall Windows 7, since almost of the games developed so far donīt work for windows 8.