Fallout – do with the disassembled weapons shipment

So here are the rules for DLC:

• Anyone can play DLC on the Console on which it was purchased
• The person who purchased the DLC can play it on any console

Now it seems like you already knew this part. However, there is a third rule!

• Once per year you can move all your DLC to a new xbox! It is now considered to have been purchased on that xbox.

Using this magical third rule you (or your girlfriend) can recall all your DLC to a new box and anyone can play it on that box. It would become the "First" xbox in your example. This should not affect any saves on that box.

If you are on the PC version, open the console (which is essentially the same as Fallout 3's console) and set ED-E as your target in the console - using the prid command - and moveto him to you. I lost some of my companions at one point and doing this got them all back.

Console commands:

prid 001732d1
moveto player

The refid will be different if you have upgraded ED-E. You can see all his refids here.

Type the commands into the console, save the game, then exit and restart Fallout New Vegas - Steam achievements will be enabled again and ED-E will be with you.