Can I add a MailContact as Resource?

Might be a silly question. What I want to achieve is that a resource mailbox (Room) on one Exchange server (A) is available as well as Room resource on another Exchange Server (B). Both servers are connected with Federation, so calendar sharing between users is working fine.

On an Exchange 2010 server (A), if I check with Get-Mailbox on a room resource, I get the attributes

RecipientType                          : UserMailbox
RecipientTypeDetails                : RoomMailbox

Is this the reasons why it is then listed in the GAL as room resource? So that in Outlook I can select it as Room?

Next, on another Exchange 2010 server (B) which is connected to the one above with Federation I have added the room resource as MailContact. When I check with Get-MailContact, I get the attributes

RecipientType                          : MailContact
RecipientTypeDetails                   : MailContact

Would changing RecipientTypeDetails into RoomMailbox allow an Outlook user to see this contact now as room resource? If yes, how can that attribute be changed? 

If this is the wrong approach, how could I add a room resource of server A to be accessed as room resource for users on server B?

Again, Federation/Calendar Sharing is working perbectly between the two Exchange 2010 servers. I am just looking to optimize the Resource Scheduling experience of the users. At the moment, on server B, they have to add the room resource as another normal invitee to meeting requests. This works, but is not logical.

Thanks

Dan