[Q] DooMLoRD Easy Rooting Toolkit - is there a way to unroot? [Xperia P] topic

Hello, I'd like to root my phone with this method - http://forum.xda-developers.com/xper...t-v17-t2335992 but there's no unroot guide. Is this possible? If so, how? If not, then would you direct me to a safe, stable and simple way to root with possibility to unroot then?
And, what I mean by unroot, is then ability to revert everything to stock.

I want to copy my save games (documents folder) and they are on internal memory and not on sdcard, so I don't see possibility to do that without root, but I might be wrong. Is there such possibility?

Thank you in advance, I'm kind of in rush.