Before you flash, you root, use titanium to backup.
After flash, root again, then restore your system setting.

Actually no harm to root.

Chance to brick - High if you mess up
Chance to regain control - High, just go to download mode and reflash

Chance of eventual success on upgrade - High, just keep trying and note down mis-steps.

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Added on August 12, 2010, 5:35 pm

Click the contact
Edit, then select ringtone.

ok, does anyone know how to sync contact picture to facebook profile picture? till this day i still cant find the way, i already add email to the contact, then choose sync with contact from the integrated account. still the contact picture is blank