I have a 1.1.3 iPhone right now...

if i back up my data in iTunes, and restore to 2.0 using the pwnage guide, will all my information (notes, sms, pictures, ect.) be restored using that backup? Or will i not be able to apply that backup to 2.0 using iTunes? I am afraid that using pwnage wont make iTunes realize my phone was just restored, not allowing me to restore my information. Are the file...encryption???...style the same because i read that cerain firmwares use different ways, not allowing the backup to fully reload to another firmware.

and i can just downgrade back to 1.1.3 jailbroken and re-load my backup if all fails for me right..........?
any alternate ways to backup sms, notes manually..? (SSH)

Sorry for the long serious sentence....
Please help??