Recently played DM. Thought I might also test the Veronica glitch that lets you have all the companions you want. Turns out, when I went to.the Sierra Madre, two companions got sent home(Boone and Arcade) while I kept Veronica and Raul.
I had previously packed Veronica with healing items and ammo.

how does that glitch work and i liked keeping my stuff but it made hh a little to easy

I somehow managed to bring Cass and Raul to the Sierra Madre with me. It was actually quite unexpected to see them waiting for me in the Sierra Madre lobby when I got there. I wonder if Elijah knew they made it to the casino before everybody else.

I found that it was not however, follower friendly as both Cass and Raul had gotten stuck quite a few times actually.

Yeah. Mine got stuck a lot. Especially in the vault.

You use exploits/glitches and expect the game to run correctly afterwards..?

It was, more or less, when you have to jump platforms in the vault. They didn't and fell down.

http://fallout.wikia.com/wiki/Fallout:_New_Vegas_companions

Scroll down to bottom - tells how to do it. If you have already done certain things, apparently doesn't work.