yeah mate, first you have to put your drums in the mixer (preferably using the layer function ie. all the drums under one tab, so you dont have loads of confusing automation clips), then right click an the channel volume corresponding to the drums, select 'create automation clip. Once youve done this go to the playlist and you should see the automation clip, then you just experiment from there.
If you get stuck let us know man.
this is just the tip of the iceberg mate,soon youll be making loads of automation clips for shedloads of diffrent effects or whatever really.