Try a program called Anvil studio (
http://www.anvilstudio.com/ ) open up a rhythm track, choose the stuff you wana use ( snare, hi hats, china , all standard midi crap ) and place it on the grid. Needs a little getting into but once you get the hang of it youl find out how good this lil program is. To change time signiture just click above the bar you want and change it to anything you want.
Once youve got the track how you want it, save it and open it up in Cubase or what ever and play along.