No entry sign on MacBook pro when installing snow leopard from 'new' disc onto new HD
Is your friend's Snow Leopard disk one he got with a Mac, or one he purchased at retail?

Disks that came with Macs are hardware-specific, if it came from a different model/revision than your MacBook Pro, then it likely won't work.

Try your install with a retail disk (or a Lion/Mountain Lion installer on USB) and see if that works.