I would guess 'probably'. <img src="/ubbthreads/images/graemlins/biggrin.gif" alt="" />
There is a known problem with the copy protection used in Beyond Divinity with 64 bit versions of Windows, but Divine Divinity works fine under 64 bit XP. I don't recall anyone mentioning either game under Vista (though with the changes MS is making to how drivers are handled I would think BD may have problems even with the 32 bit version).