I got it working for me now.
For those who still can't, the tricky bit is getting the settings right for the inputs and outputs of midiyoke. So i made a screenshot:
All that is needed for this is midiyoke output 1 track on;
midiyoke input 1 remote on
Now press midi map, assign a note to scene down, and another to scene launch.
On a midi track, set the output to midiyoke 1, and create a clip.
If you want the scene to change after 4 bars, put the note you assigned to scene down just before bar 5 and the note for scene launch at bar 5. Voilá!
Now you can copy that clip to other scenes and change length if needed and rename the clips something like 8 bars, 4 bars, etc. Groovy!