Mick,
Most people have inserted the flyscreen rubber (the rubber that is used to hold a flyscreen into the frame) through there existing door seals. Apparently it is not that hard to do, maybe using a coat hanger or something. Also dont forget to silicon up the 2 slits in the bottom of the door seals of each door.
Luckily with the update Disco they have improved the seals so there is no need to do this.