OPIM SS6 - Network Build

I'm happy I have OPM running off my build and on the network.

However, I'm having issues with OPIM. Is there a way to have it read config variables from within OPM so I can avoid editing local cfg files. Can't seem to get it to pick up a network project location if I set _USTN_INSTALLED_WORKSPACEROOT inside OPM instead of OPMdir.cfg.

All suggestions welcome.