How to Create and configure a meeting room mailbox with Exchange Server 2007

Now if Outlook would use the set variables of the "-ResourcePropertySchema" along with a numerical method to search for the "-resourceCapactiy" when booking a room it would make our lives a lot easier. I've converted 4600 Room mailboxes in our organization and the users LOVE what they see. They just wish there was a search tool that understood what was possible in the fields (from the schema variables) and then mapped them into check box (for both requires/does not require) to search for the room features. Also the room capacity needs to be searched in a way that if you enter a value that any room with capacity greater than the room also matches the search.