Trying to re-do the Edgar entrance scene

The parts you mentioned are not actually being omitted. It's just that the game processes thing very quickly, so the game does CD and then does CR so quickly that you don't even have time to see the CD. Try putting a small pause between the two.

Subroutines are not as complicated as they sound. There's a couple hitches, but in essence "B2 XX YY ZZ" means "Go to the code at address ZZ YY XX, do whatever's there and come back here after".