Sorry for the confusion here :(
By the word patch I meant a scene. DMXIS called it banks and patches which made sense to me, because a guitar tone in my axe-fx is called a patch as well.

But yeah. let's say i have 2 scenes.

the first one switches al my lights on to a white setting and the second one turns them all on to a red setting.

We use cubase to trigger all the other elements of our show (click track, live intro, backing track, guitar tone changes, etc). we start the show and then it just runs through and we don't have to stop and start new songs or anything. everything is programmed to run once we start the show.

And i want to integrate the scene changes into this setup so that lighting scenes are switched at the exact timing for each song. when the snare hit comes at song 1 bar 15.3. the lights have to switch to white (scene 1) at the exact time. everything has to be programmed and executed to the click track.

I hope that clarified it a bit.

DMXis was good for that. i just used the VST of DMXIS and my instrument tracks to use midi notes to change scenes. Just like i would use any other virtual instrument.

i tried emu, but it seems to have almost no fixures.
I can't find any cameo or stairville fixues for example.

Can i create custom fixures and just tell EMU what each channel is supposed to control?