Okie the inicial post was about a live setup... MachineDrum is wicked... but If u wanna take yer already made tracks live then I guess the sampler is the way, u just get a hardware seq (or get both with somethin like an MPC1000) and trigger each track (after rendering them 2 seperate tracks, or by seperate patterns)...
The md is more if u play 2 do a lot of sounds from it, them u can tweak, etc... live!
Z