Sorry
Within 2 years you will have to upgrade as with 98 before microsoft realesed buger code in so many of last updates for 98 which made it so unstable.
So faulty code in updates for xp will be realesed forcing people to upgrade to vista, as already more people around world having xp problems, ever from the realese of i.e 7.
Talking to various hackers who agreed with me if you going to put vista on with xp, use xp only for your children to access internet, as when xp came out with a lot of it's spyware intact.
Millions of people around the world ended up with child pic's on thier system, lot's of pedo hacker's used xp spyware to get them on computer's.
So 1 chap i instaled 98 with full security so his children could access net while he and his wife used xp, put it this way thank's to gates and yank goverment having fun with xp.
Talking 1 policeman over here who was into catching pedo's he said they nabed 1 family's computer but found out they did not download the pic's it was a hacker who did it.
Why do you think microsoft were forced to close thier loopholes,, so thank's to bonzo bush wanting to spy on peep's computers vista has nice spyware built in.
FOR god's sake if you going to use a vista, xp combo machine do not do not do not let your children use vista to access internet, keep them with xp.
Remember bonzo bush gave himself powers that he can order us mail opened even stuff arriving into yank land, he can order a mail truck stoped and every letter and parcel opened on his orders with his new power's, so just imagine what he and gates have got upto with vista.