Hi and welcome ...
Answering your original question - can't you just buy some drum samples and sequence them in Cubase? I don't use Cubase personally but I use Sonar which is it's main rival and that has a fully functional drum machine built in - you just need the sounds.
Your are most welcome to stay and chat here but I would suggest that if you want specific info and suggestions for Cubase there are loads of forums out there specifically aimed at Cubase and music making that would have a wealth of experience to offer. Try googling
"Cubase forum help" for loads of forums relating to Cubase or
"Cubase Tutorials" for lots of suggestions - I'm sure there will be drum programming tutorials out there.
Actually Googling
"Cubase drum" comes up with loads of stuff.
Does this one look helpful at all:
http://www.drumslive.com/Let us know how you get on.
PS: Actually I was going to suggest FXpansion as I have the DXi version of it - hadn't realised that they had branched out into VST territory now. FXpansion also has a really good user community that share sounds and settings. Worth a look.