Separation of midi track recording to different tracks

ok, so, on my yamaha mm6, i recorded a song of drums, bass and piano…i recorded into cubase 7 midi track…now i want to separate the parts to different tracks, ie drum, bass and piano…sorry i wasn’t clear in the first post but wasn’t sure how to explain it…want to use slate or superior drummer for drums, addictive keys for piano and some synth for bass but wanted then on different tracks…possible? thanks