Go to bed!
Sorry I just thought you needed us to tell you what to do
Seriously though, use common sense. We do not know what problem you are having, copy of windows or what mac you are installing to? So how can we in a brief 2 sentance diagnose your problem?
Go back to OS-X and reburn the driver installation disc. If that doesnt work, then you have successfully diagnosed your Windows XP to be the problem and we didn't need to do it for you.
Secondly if it is your windows XP, re-install it or use BootCamp to delete the partition and start again.
There may be problems with certain versions of windows XP, and as this is unsupported BETA program don't expect solutions to come out of the woodwork thick and fast.
I'm sorry if this answer is a bit sharp, it just seems common sense should be dictating your next move and not the people on the forum