I made a little screencast for installing DDWRT on my Linksys WRT54GL v1.1 Router, and it only takes 2 mins! What’s funny is that it mostly took that long so I’d be going slow enough so you would see what I was doing. Very easy, but you must watch it at high resolution in order to see the detail.
(Make sure to choose at least 720p to see it clearly!)
You can do some amazing things with DDWRT like adding a SD card port and using your router to download torrents for you!