Have you tried setting "VoodooInt=NO" in Mediator prefs?
I also have a few packages that might help you here:
MediatorENV.lha - another Mediator preferences program, similar to MedConfig
PrometheusP96install-2.1a.lzx | Prometheus exclusice
PrometheusP96install-2.1b.lzx | P96 install packages
P96Manager_WB31.lha - Picasso96 prefs program for WB 3.1 and up (similar to PVS but better)
P96Manager_OS39.lha - Picasso96 prefs program for OS 3.9 (maybe 3.5 also, similar to PVS but better)
P96Manager_MUI.lha - Picasso96 prefs program for MUI (similar to PVS but better)
Feel free to ask if you need any of these
