What is your format you are using? WM9? If so, MS has some DRM vendors listed on their website. But beware, DRM for WM has been cracked and cracked again. :)
DRM is for keeping honest people honest. That's all it can do.
One ethics teacher (!) complained to me that he couldn't copy his pre-release DVD of "What The Bleep Do We Know" to video cassette. The reason was Macrovision.
I disagree partly. DRM while it may keep honest people honest, it also provides a hassle and a punishment for being honest while the dishonest are free to enjoy their conttent whenever and however they want. A perfect example. I purchased a video from CinemaNow, started the video, received my license and the video ended up crashing my computer before I had a chance to even back up my licenses.Called CinemaNow and their solution was to buy another license. No thank you.
Thats exactly why Sony is pushing Blu Ray. Its not for the quality as the same quality can be had using H.264 AVC as it could with Mpeg-2 but its the copy management that Sony and the studios want.
Ken, check with Eric James at ericjames [at] expertmagic [dot] com and ask him what he uses. He offers downloadable video files of his magic tricks. You have to buy a license in order to view the video. Seems rather simple and straight forward.