back to stock recovery & update using update.zip format without computer???

[joeyx2]

I remember a few months ago I found a page on here that allowed me to unroot my droid1 by flashing and update.zip (without computer). It brought me back to stock recovery and stock update. Does anyone know where that site is cause I can't find it. My phones been acting up and I just got it a few months ago cause my screen cracked and I had to replaced it. So I wanted to unroot and see if it still acts up. If it does then I want to try to return this one. Thanks!