1.) Before you downloaded 5.0 ... Did you back up your BB when it 4.7?
If you did .. Good
2.) So after you upload 5.0 ... You won't have most programs... Connect your blackberry to desktop and restore your Old 4.7 backup.. You will get your phonebook, apps, and everything you had... And still have 5.0
3) Remove 4.7 themes .. And download messanger again... If u had the lastest BB Msngr ...it comes with a back up...
Also... When u download 5.0 ... Us the theme it came with "Zen today"
Posted from my CrackBerry at wapforums.crackberry.com