DWL-520 Wireless Woes

Got a new machine that I'm trying to setup for MythTV. Decided to put a wireless NIC into it, and ran into install problems. Followed the directions at:

https://help.ubuntu.com/community/WifiDocs/Device/DWL-520vE1

then continued the process with the directions at:

http://ubuntuforums.org/showthread.php?t=643467
http://ubuntuforums.org/showthread.php?t=606861

and still didn't succeed. Figured I'd better make a note of it, in case I ever care to try again.