Flashing RUU returns to out-of-the-box stock?

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http://forum.xda-developers.com – I'm struggling with all the terminology and methods with flashing. Basically I just wanted root, so I read several different guides and got a rooted status and managed to install the Amon Ra recovery. However my bootloader (also called HBOOT - is that correct?) shows tampered / unlocked now. Basically, I want to flash back to the most current build and try again. Would the link on the Android Police forums to download RUU 4.03.605.2 be latest Verizon build as if it were fresh out of the box? I checked on the wiki, but didn't see anything for the Rezound there. Also, to use this (HowTos)