I know I'm being greedy by asking this but, is there a way that someone can make it so the player can have all the companions instead of having to choose?

There's already a multitude of mods available that address this.

For those of us not in the know, perhaps a couple of links?

http://www.newvegasnexus.com/downloads/file.php?id=34870

how about a mod that ties your companion limit to your CHA score?