This seems like an incredible tool. I was able to do basic stuff with it in under 5 minutes and that's an accomplishment.
 
I can see 4 samples for each lane and nothing more. In the demo vids the guy has 100's of samples to choose from. I tried to load samples from BFD3, AD2 and Battery but they just don't show up in DR. What am I missing? 

The samples must be in wave, aiff or ogg format and my be loaded by an sfz file too.
 
The content which ships with DR is in your "Cakewalk Content" folder under "Drum Replacer."
 

Thanks Scook. I found it but the folder that's labelled drums only contains 3 empty sub folders. I have no idea how to convert my drums to the required format but hopefully that video will show up some day.

Here is a thread which goes into some detail about the same subject http://forum.cakewalk.com/FindPost/3230208