@senterpat - elaberate
http://www.nexusmods.com/newvegas/mods/45346/? this is what i'm looking for, but this mod only effects FNV vanilla companions. i've looked under the hood to see if i can reverse engineer it but my knowledge is just to limited to make sense of it. hell i'd add the fuctionality to the fo3 companions and submit the work for everyone to use, if someone where to look inside and give me a point by point process for how to do that either with fnvedit or GECK.
"However, anyone is welcome to pick up my mods and enhance them, as long as they give me credit (and preferably a heads-up so I can check out what cool things are added). I'm even willing to assign co-ownership of my mods if someone like-minded produces a sensible enhancement that they want to continue to maintain." - HunterZ (the author)
from what i understand it is a pretty complex mod
fun tidbit regarding Follower Cheat Menu (FWC - linked above) the move player to Follower can be used to warp the payer between wastelands. at this time you can go from dc to nv but since it doesn't support dc followers you cant go from nv to dc unless you leave an nv follower in dc.