Get Tunebite. Select the songs you want to strip. What it does is it plays the DBM encoded songs, but it re-records them as it is playing them. Make sure that you don't have any other sounds running, like AIM or anything else, or else those sounds will pop up when you rerecord the sounds.
It's really easy and nice to use though. Get Tunebite, download Ruckus songs, rerecord with no other sounds playing (i.e. AIM so on and so forth). Profit.