Easily Identify DRM files

Hello all.

I save all my music on an external hard drive. I have a big collection of iTune purchased songs, as well as CDs that I ripped myself. I would like to organize my files and gather all the files that have DRM encryption in one folder, and all files that don't in another.

Any advice on the easiest method to do this? Is there a program that will scan all my files and list the ones that have DRM encryption?

Any help would be greatly appreciated, thanks in advance.
Floyd

If you want to do this within iTunes you can make a smart playlist of your iTunes plus tracks. (Sort by Kind) AAC Purchased, I think (Not at home at present). Your other ripped tracks I'm not sure about.