[nFiniti]

It doesn't change anything about your phone or your epst settings...
I was scared the first time too... But I flash every day or more then that...

Its very easy man... Just make sure you follow the directions and there will be no problems!

Backup your contacts... then hard reset the phone... then put it into bootloader and plug it into the usb... it should say usb on the screen... make your os, then create the rom via the directions... let it do all the good stuff it wants to do... then when it says its done, unplug the phone, hard reset... and boom your done... when it tries to customize... I'd reset the phone if I were you... unless you've deleted your ext rom already..