Requirements:
A (trusted) friend that has the season pass
Basic Xbox Smarts
1. Your friend with the season pass will recover your account
2. He'll start up GoW3 and Download the map packs you need onto your account (FROM THE SEASON PASS)
3. Once done downloading,you will recover your account back
4. Go to Account Management,Then Download History (No need for license transfer)
5. Re-Download Maps.
The only problem I've found so far with this is if you go back to the "press start" menu,you'll have to go back to the Xbox Dashboard.
But other than that,works perfectly fine!