As title? Im trying to add the sturdy caravan shotgun to the "and stay back" perk in dead money, but the GECK refuses to let me load both DLCs at the same time.

It's something the devs put in the GECK to prevent people from opening multiple master files, god knows why. It's simple to change though:

Change this:
bAllowMultipleMasterLoads=0
to this:
bAllowMultipleMasterLoads=1

In My Documents\My Games\FalloutNV\GECKCustom.ini

If that line isn't in there just add it.

Thanks