In the boot menu of nero7 i will need an image file. How i wiil create it or where i will find it?
google is your friend
actually, see that's the problem...if you're planing on making a bootable windows CD you need a special type of image file. and identifying, supplying links to, or probably even giving you hints on where to find it would most likely be against this sites ToS, Microsoft's rules, and my own personal beliefs.
this image file isn't supposed to become a "file" and has been illegally produced from a legal windows CD.
(one other tip, XP/SP2 should fit perfectly on a simple CD-R no need to waste a DVD)