easier to use a Live CD, a USB stick, SD card, CF card, netboot CD or some other method.
Is there a really good reason you can't use any of the above? Why are you trying to netboot?
Please post your full hardware specs for both computers and your network.
Do you have proper, working PXE? If you don't it's not going to work even if you could get windoze to play ball.
Have you ever PXE'ed before?