not sure what is going on, if I double posted, my apology's. I cant seem to post right now.
EDIT
If your a newb, your going to want to do something similar to this:
https://www.youtube.com/watch?v=TjZS61Wg-XY there might be a factory Drum Map for the TD-25 im not sure, but I do know Ping..AD2 is superior to session drummer 3.
but session drummer 3 you can also drag and drop samples on to the kit pieces, this is one of the things I like about it. if you want to read up on SFZ files you can even customize and create your own kits using your own samples.