Live ID Country Swithing

I know I can not change my country for the Live ID I use for my Xbox or Zune (this is a known issue across the internet).

However does anybody know if I can transfer my Achievements / Points / Gold Membership / GamerScore / Downloaded Content to a new Live ID with a different region setting?

I currently have a Live ID set to Belgium but moved to the USA and would like to switch to have access to the USA features and marketplace. I have set up a new account with US Marketplace settings, however I was wondering is I can transfer my Xbox live stuff to that account to completely get ride of the old account.

Thanks guys!