Hi guys! If you use a modern MPC, check this out!
I was using BlueBox before to create programs, but found it wasn't that much faster than doing it on the MP. I searched a little more on the webz and found this pretty awesome open source program: MPC Maid.
It's insanely fast compared to anything else I've used.
-It has drag and drop functionality; drag in a whole folder and it asks you if you want to do velocity layers or one-per-pad.
-You can also copy Params (mute group and mono/poly) on all 64 pads at once.
-You can chop long samples, Recycle style, in the program itself! http://mpcmaid.sourceforge.net/