Did i get your workbench screens andy ??? Please mail me what you have if you can ???
As for the dual layer disc its only because the thing is so damb big not because of any reading problems !!!
What i may do is release 2 versions....The 4 gig PC only and the multi boot 7 gig version that works on xbox as well...il have a play to see how things work out as a lot of people dont have an xbox so they can still happily use the PC side of things and it will be a lot cheaper