acetech

you do not need a windows xp cd
it will create one itself although a slimmed down version using files from your computer and system 32 folder - so no you do not require an xp cd


read the FAQ on the website for UBCD4win website
it really is a great peice of software you just need to boot up off the iso when your pc boots and your in can even surf the net / download updates for antivirus or whatever and all in a slimmed down version of a windows xp enviroment..

i have used the disc myself only a few times and am still learning some of the software tools available for use,
but in my opinion you can practically fix any issue you have with your pc as the tools range far and wide for all manners of fauts your pc can experience