How can I download and install custom roms for the droid x? I have a droid x. I'm told that my phone will be much faster if it has a custom rom. After some googling I read that rubix is a good option. I'd appreciate any instructions on how to go about obtaining and installing this custom rom on my phone, or any pointers to this effect.
I think the instructions you find in this thread are fairly clear, aside from the process of rooting your phone and installing ROM Manager.

All the standard disclaimers apply, of course.  What you do with your phone is your business and nothing any of us say makes us responsible if you brick your device.