ex2010 - Delegation for Room Mailbox

Hi all.

We have a conf room with video facility, i created a room mailbox for the same.

no auto approve requied for this mailbox,Now i need this room mail box to be to delegated to my reception, 

so that she can approve the request based on the avilability

also i want the room mailbox calendar to be appear in her Outlook calendar.


Please help on this


Thanks in advance

Senthilkumar