Yes, that's what I'd go for. I've certainly used the Mod Switcher with Chiv with no trouble. Never tried it with RTR, but so long as you auto-install to an empty folder that should give you the Data folder you need to make the RMOD. Let me download it and have a look.

Oh, but just to be sure, make a copy of your Data file once you've installed the 1.2 patch. Just as a backup in case something goes wrong.