Ok, I'm having some real issues here, most of which I am sure it due to me not keeping up with things and misunderstanding what has changed.
So my work flow is this:
Installed W7
Installed the beta CRTemu driver as admin, allowed test mode
rebooted
PC monitor now out of range, connected to arcade monitor and resolution is 320x240, managed to get 480i enabled thanks to arcadeosd
reboot
arcade monitor now a mess, resolution seems to have defaulted to 1024x768

connected arcade monitor, reboot again
PC monitor now out of range, go back to arcade monitor, resolution once again 320x240
I figured something went wrong, so I uninstalled the driver and started again
Installed driver as admin, allowed test mode to be enabled again, rebooted with arcade monitor plugged in
Again, it's defaulted to 1024x768
rebooted with the pc monitor attached and guess what? 320x240

I have a feeling I will be going back to XP pretty soon, any idea what's happening though or what I'm doing wrong?