Hello all, I need some help and I'm not really sure what to look for. Ok here is what I am wanting to do.

My girl is a karaoke Dj, and we lend out our equipment to the other Dj's that work for us. All the music files that we use are on a portable hard drive and we use a program that opens then through winamp. What we need is a way to encrypt the hard drive but will automatically open them without a password on the two laptops that we use. Then when the hard drives are hooked up to a computer that isn't installed with the encryption program, wont open or be able to copy the files.
Basically we want to make sure that the people that work for us can't cope the files that we have bought and use them to go off and start their own company.

I hope that I have explaned myself clearly if not please ask any questions that will help clear up what I need.

Thanks for any response.