[galaxy-user] Standalone galaxy server and user management

Hi, we want to use a standalone Galaxy server here and integrate that with our Sun Grinengine cluster. While I could find information on how to do that I also want to know if it's possible to use our local user database (NIS based) to manage the galaxy users and make their galaxy scripts running with their userid. Could somebody tell me if that is a) easy b) hard c) impossible regards, Andreas