My Linux kung fu is rusty. Is there a safe, semi-convenient way to switch back and forth between a production and a beta driver? I don't want to clobber my production system with a beta driver. Last time I did that, I ended up losing the system and had to spend a few days reinstalling. I don't really want to have to reboot into a completely separate system all the time either. I'm thinking, something like an installation with multiple X servers or something like that? Then I could use all the same kernel, apps, libs, paths, etc. and it's just the X server that changes.