Simples guys, just use the earth off the door pin so when door opens it completes circuit, light comes on as this is the earth for dome light, and 12v supply from window actuator. That doesnt mean it works when you operate window LOL. If you tap it off before the switch and same with earth, tap off before otherwise permenantly on! So..... constant 12V supply and earth when door opens off door pin, window motor circuit unaffected as the LED'S require milli amps and the motor will work as normal not affecting LED'S as its in parallel, only if the motor was to draw too much current would it stop lights from working, as this would rupture fuse. Just the same as tapping a supply off in your house. Havent done yet but will shortly aswell as headlights R8 style and why the door is off, the cup holder lights will also be changed to LED'S.
Had a thought though..... The only disruption to the passenger door could be the window lock from drivers side, think the car has that but not sure if that removes earth to prevent operation or removes the supply?