I have seriousley p****d someone off, and they're threatening to 'crack' my program and give it away free on the net when i finish it.

I'm not sure what he can do, but i know he knows some 'hackers' and other dodgy geezas

I need to protect my program!!!!!!

I'm going to sell it by mailing CD's. How can i:
a) Protect my CD from being copied
b) Protect my CD from being copied to the HD and run (so he cant make it available on the net for download!)

I am open to any ideas to protect my program!!!!

btw, is there a way to copyright my program or something, so that if he does 'pirate' it, i can report him or something