Butch up girly pants.
1:- Back up your music & podcasts to your computer - I don't really have any
2:- Backup your phone to Skydrive. - I do this anyway
3:- Get the NSU For Retail from ^JP^s post on the previous page. - Will do
4:- Install and update to 3.08 - Will do
5:- Open NSU and plug in phone, it'll say an updates available. - Ok
6:- Click update. - Ok
7:- 10 minutes later it's done. - Ok
8:- Your phone will reboot, it'll ask you for your Skydrive login, then it'll say do you want to reinstall your apps, yes. - Ok but will the apps have lost their app data, settings etc?