You want to get rid of vista and install xp?
is it acer :-Acer Aspire 7520 or 7520z ?
As I have just read there specsifications and it does not mention it having blue tooth.
These are the ones with bluetooth:-
http://www.shopacer.co.uk/search.asp?
I would try googling for xp drives for internal parts of you laptop and see if drives are available.