Basicly I did the vault 22 quest, got the info, then did Veronica's. Now she wants me to go to vault 22 to download the info, but I've already done that, and am now incapable of doing so again. Anyone know a way around this or is this quest now doomed never to be solved?

If you saved the info, you could try heading back to the Elder with Veronica in tow. Failing that, I think you can tell her that you'd rather find something else. That pulse gun is mighty fine...

I also had the same problem. I also rigged the power to not go to the weapon, so I guess I'm off to get a rifle lol.