Yes, I have kanto as it came with the ROM, and the orange islands just make somehow fit, I duno maybe use the Pokemon Naranja map as a reference?
As for hoenn, sinnoh, and johto, make water routes that lead off-map so kanto to sinnoh, johto to hoenn, and make a thing sticking out of kanto to go to johto, thanks, I am going to support you if you can get this done, Red