if you have jjos try arranging your whole song/sample structure in a daw (or your mpc for that matter) and converting it to a single .wav file.
add this .wav file to a track, but make it an audio track. now youll have the skeleton of your whole song in one sequence, then you can loop certain sections and add your drums on each different track.
so all in all youlll have one big sample which is your whole song structure lets just say its this( 4 bar intro, 16 bar verse, 4 bar bridge, 8 bar outro) this will be your song.
put it on an audio track, make sure you know the bpm, and bar length, in this case it would be 32 bars long
audio track thats 32 bars
-kick
-snr
-hat
-ride
-toms
ect ect
now you can just loop 8 bars of the verse, and when you get your drums perfect, copy it over to the end of the verse, change so some stuff and start working on the hook.
i have the same problem as you because when using the mpc in standalone because im used to using a daw to make my beats on. this is kind of a more linear approach to making beats on the mpc.
check out my thread here, i got some cool ideas from other members about how to go about using the mpc standalone.
http://www.mpc-forums.com/viewtopic.php?f=8&t=148888@lamp
are you saying in songmode that if say you put a crash on your hook and didnt have any crash samples on your verse, intro or whatever, that you should still make a crash track on the other sequences because if you dont it wont show up while in song mode?
