Yep, the three starters are Meowth, Koffing, and Ekans
Sorry for not responding, I've taken a break but now I'm back working again, especially since I have some competition in the first generation hacks.
The mapping programs I used was RedMap and Pokemap, and as for changing the map layout, Coolboyman said how to somewhere in his Pokemon Prism thread.
Oh, and you only play as James, not Jesse.