MCPM: Licensing Question

[Stephen Walker]

Here's a question for everyone.  I have a site that WalkerTek developed for
a client that resides on our server.  The system runs with the help of some
specialized core modules that I built that are not meant to be distributed.
Normally I wouldn't care about setting this up for a client, but I don't
trust this client and feel that we may loose a lot of business if we setup
everything on their server.  How would you handle this situation?
Licensing, contracts?

Any thoughts and ideas are appreciated.

Thanks,
Steve