My mac mini (2007) has a problem while installing windows.
I open bootcamp assistant, I create the partition, reboot from disc and then there is a blinking cursor and then a black screen.
OS X Leopard 10.5.7
Windows XP Professional 32-bit
Try boot it on another computer. If it doesn’t work then your installation disk isn’t properly prepared. Use a Windows XP image, which should be some 600MB of size to create the installation disk. Use Rufus to create the installation media would be idea