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Boot Camp 5, the version that comes with OS X Mountain Lion, is only compatible with Windows 7 and soon with Windows 8.
However, if you upgrade from an older OS X version and you have Windows XP or Windows Vista installed with Boot Camp, you can continue using it without any problem, but you won't be able to update the drivers
Its Many a times when we struck on windows 7..Like many software of windows not work on it...So windows xp is best till now..Not even Windows 8.So what you can do is Install virtual pc software on it and after that install Xp on it.
It will work fine and you can do whatever you want with that..
If still you have any query then you may contact me on my fb account as firstname.lastname@example.org