Well after looking into this, it is SORT OF possible. If you use palettes per fixture type you can use those palettes on the house fixtures. You can even duplicate your fixtures in the editor after you add the house rig in. For example the fixture groups window, after you add in say 4 house lights, you can drag and drop a fixture of yours from the grid in top of the new fixture and whatever channels are close to the same as your fixture to the house one will update. and from that point you can modify the house fixture but simply selecting only it. This works great on about 50 scenes or less. After 50 scenes I imagine it would be come cumbersome to update.