Delete standalone outlook.com account so I can use the address as an alias for my previous Microsoft account

I have a Microsoft account I have used for everything (Xbox live, windows phone store, windows 8 store, skydiver) also have a separate outlook.com account I created when outlook.com started.

I would like to remove the standalone outlook.com account so I can add that email address as an alias to the MS account.  Only problem is it says it would hold that email address for a year (I think it was a year don't remember exactly).  Is there any way anyone at MS can help with this.  I have access to both accounts but just want the standalone outlook.com one to be deleted.