[itsm] Help Needed: Question about configitem classes

Hi, I'm setting up some config item classes for our company for server, software etc. I want to modify the existing classes by adding new fields. Now I have the following questions: 1. Is there a type for select boxes with multiple selection? If yes, which type is it? 2. Is there a way to put a help text on fields? Something like a mouse over giving the user a hint text what to fill in. Thanks! Regards Petros Dolaschjan