Does anybody have an un-modded 'Menus' Folder, from the Data section of the FNV directory? I think I may have overwritten some stuff in there which may have been a bad idea. thanks.

Is the "Menus" folder even in an unmodded game? I've looked through mine, and I'm not seeing anything not added by my mods.

Everything in your menu folder is mod-added.
The original menu folder (and all it's files) is in 'Fallout - misc.bsa' archive.
you can browse the bsa with FOMM.