The main issue here is that you're going to need to make a boot image file, and then have something that will read that file.
Nero seems to expect a floppy disk out of the gate, which is typically not a good thing. But the key question is making the boot image and getting it onto the disk. Or if you are wanting a Windows XP startup (i.e. recovery console), you can get the appropriate software and take the boot block off of it.
More if I can find it - I really need this info myself.