Go record up to 32 different kick, snare etc etc hits on a single track, making sure to leave 3 second gaps between hits.
Then insert drumagog on that track
Hit the tab left of "advanced" called "samples" i bleieve is what its called.
Anyways its the screen with the big open box in it.
( i dont have it in front of me so this is from memory, bare with me)
Now choose NEW/then name the file you choose for the new .gog/make sure that the end is still .GOG
Go to the record menu in the same screen. and choose how many multi samples you want 16, 23 ,32 etc etc....
Now hit record usuing "capture from track (this isnt the exact name for it but if you look at the screen youll see something like it on there) at this point
it should say "Listening"
Now go to your audio player and hit play at the beginning of the track.
Drumagog should begin capturing your hits at that point.
When its done and youve pressed stop the gog file will hav been created.