this is a cut and past from code made for 16F87x i think this should be compatible for 18Fxxx... (???)
on this exemple receving is not made by interuption, so you have to pool the rcv subroutine.
and interrupts shouldn't be too hard to add. currently, there's not much to interrupt so this should do just fine.
thanks!
fell free to ask me question about pic (never used 18F, but I used 16F a lot)
I also can help for the hardware part, pcb and maybe some asm.
cool. quite a team already :)