Have i got groove agent?

Hi Chaps,
New to Cubase coming from Cakewalk guitar tracks 3 so a bit daunted.
Gradually finding my way round cubase via u-tube, manuals etc and have managed some test recordings , effects etc but on my version of Cubase AI8 cannot get groove agent or halion do i have these features at all?
I have down loaded lots of drum kit files from Steinberg but still cannot bring up groove agent on screen, to do anything.
Any simplistic help appreciated.

Cheers