Hi,
In a nutshell:
Create a user, name it for the room (resource),
Open the permissions and assign someone the right to open that mailbox,
Set up a profile for that resource in the assigned person's Outlook,
Open that profile
Go to the tools -> options -> calendar -> resources and
set the mailbox to automatically accept meeting requests and to decline conflicting meeting times
(This is just a pretty up step, very optional) open the user object for the room and put "Resource" in the desciption, create a new address list in Exchange manager, Call it Meeting rooms or some such thing,and create the rule for the address list:
user -> description -> begins with -> and put the value "Resource", and add the rule. Preview the list just to make sure the resource shows up.
Now your users will see in the Global address list "Meeting Rooms" or the meeting room name and be able to add this as a resource when they schedule a meeting.
Hope this helps,
Wyz