Secutus, I tried the template. What I found out is that it works to control Groove Agent patterns, but not individual drums. The individual drums respond somewhat randomly when you put GA in Instrument mode, not Pattern mode. Sometimes hitting C-1, for example, plays the GA drum assigned to C-1, but if the kit has multiple pages of sounds, then you might trigger a sound on a different page.
On the GA side, once Maschine is running GA, you can no longer right click on a GA cell in Instrument mode and assign a key. That function is greyed out. So I am stuck for the moment. Any advice would be welcome.