backup - How can I keep settings after flashing a ROM?

I am considering flashing my SGS to a custom ROM. I do not, however, relish the prospect of re-configuring everything. Most apps on my phone and most definitions should have no dependencies on the ROM, so I would like to be able to back up all the settings, flash the ROM and then restore them. This would include:

• all installed apps



• all app settings (launcher preferences, active widgets etc.)


• ringtones, backgrounds etc.

Is there any way to do this?

Answer

Titanium Backup from the Android Market!

From the Technical FAQ:

1. 
   

   Can it back up and restore applications across different ROMs or even different phones ?

   
   
   
   
   
   • YES, without restrictions.
   
   
   
   

Although you also have:

Can it back up SMS, MMS and system settings ?

• Please note that if you backup and restore all system settings across very different ROMs, you are on your own. Before restoring on a different ROM, it is strongly recommended to enable the "Data migration" option in the Titanium Backup settings.