What i mean, is that there are bootable cd's out there that already have a host of diag programs, like UBCD (my favorite) (http://www.ultimatebootcd.com/), but things like this are usually best left to those who know exactly what they are doing, you can really mess a system up if you don't.
I do believe that he wants to create a bootable Windows XP installation disk, right? If so there are many programs out there that will allow you to do this. I did suggest one but I do believe it's a trial version. Nero prob. will do this also but i've not used it for this purpose.
Edit:
It's funny how you made so many posts on the same topic by placing them in different sections of the forum , dont do that cause it gets confusing . Anyhow the reason for this edit is because I left you a personal message so if you'll check your personal message you just might find some info that'll help you with your problem.