You can really use any screen video capture software to re-record DRM-protected movies. I do recommend to try CamStudio first, but many people still prefer to buy some other screen recorder. Anyway I'm glad that it works for you.

As for removing DRM-protection with Audacity, even if you have only 20 DRM-protected files imagine how much time you need to record, save and then add ID3 tags manually. If you like freeware DRM remove software only, you can at least try AnalogWhole