Hi, Here's the information on how to proceed with dual booting your machine with either W 7 or XP.. http://www.sevenforums.com/tutorials/8057-…ndows-7-xp.html
It is strongly advised that you become familiar with the above before moving on to Linux….. Presumably you have already made a disc clone of your hard drive and its kept safe on removable media?
Regards
paws
Paws recommendation to have a clone of your OS drive on removable media is sage advice.
I am not very familiar with the Linux OS varieties and flavours but as for adding W7 after XP is already installed, I am very familiar with this process and the potential peril it can easily involve.
As an addition to the link Paws has provided, you might like to look at my thread on the subject here at WTT as well.