I think that the 'rules' are often made up on the spot. If the professors are willing then it should be fine. One thing to think about is if you want to audit the class (graded but it doesn't turn up on transcripts) or take the class for credit.

I hope it works out, and smoothly too. It sounds like a wonderful idea.

Smiles,
Grinity

Coaching available, at SchoolSuccessSolutions.com