Originally Posted by sawtooth500
1. What's the best way to do a full backup?
2. Would you happen to have a link that gives instructions on how to do a dirty flash?
1. Make sure your battery is charged, then boot into recovery and select backup. The phone will do it all for you, to restore the backup, boot in to recovery and select restore.
2. Download the ROM you want to flash, I always download to my PC, then move the file to your SD card. Now make sure your battery is charged, boot into recovery, select install and select the ROM you've downloaded.
The only difference between a clean flash and a dirty flash is you don't wipe anything before installing a dirty flash, with a clean flash you wipe before installing and you'll have to re-install your apps, email, etc..
NOTES: There is more than one recovery so these instructions are pretty general but you can find very detailed instructions by doing some searching and reading here.