Transition from iOS 4.x to iOS 5 and Jailbreaking

I have recently made a transition from iOS 4.x to iOS 5 on my iPhone 3GS and I can say it wasn't a particularly smooth sailing journey. Of course we're talking about jailbreaking it as well. My plan was to do this:

1. Sync & backup iPhone 3GS with iTunes
2. Fully restore iPhone to iOS 5
3. Jailbreak iOS 5 with redsn0w
4. Install AppSync 5.0+ from Cydia
5. Restore from backup to iPhone with iTunes.

Sounds easy right? Wrong! Now usually when after I sync and backup the iPhone before an upgrade of the firmware, I will do a backup of the backup first so I can do it again if I screw it up. I have written an article on how to do this before and you can see it here: [Restoring from a backup for iPhone, jailbreak or not!]

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