Ok - a few things:
1. Got Ultimate Ghosts n' Goblins working 100%, WITHOUT speed issues. The speed issues are based on which original PBP you used as a Donor. They are not all the same, and some set different timing flags for how the Emulator is supposed to run. I used GTA: Vice City Stories and it works with the correct speed. In fact - alot of the compatibility issues will likely be solved based on the Donor.PBP used. It's kind of like the POPSLoader plugin on the PSP CFW Dark Alex and I worked on way back around PSP FW 3.72. (I actually discovered the ability to switch pops versions, he wrote the plugin to enable it)
2. Also got Impossible Mission working 100% - same Donor.