[Q] Maybe a dumb question - but how to get back to stock rom?

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http://forum.xda-developers.com – Hey, i've got a little problem :confused:!? I'm on Elegancia ICS Sense 4 v.3.4.0, and i want to get back to a pure stock rom. I attached a picture of my boot-information. Is it ok, if flash a RUU with Firmware 3.33 and that's it? Thanks a lot for your help :good:, and sorry for my - maybe - dumb question! Attached Thumbnails   (HowTos)