There's a read me file here to explain what's in the directories, what needs to be done regarding AGA and some ideas if you just have to take the ECS route already. Hopefully it will be enough to help you figure it all out - I can appreciate the copper is an awkward business but there is some guide within the read me and rough examples.
Communicate what your doing so that you're not working on the same thing - the best of luck to you, and thank you.
Turri, if you don't want someone to help with the re-colouring of 4_1 say so - but I thought it would help you get on with the mapping. =)
@ Shatterhand. Copper colour is no problem in Blitz - sprites as yet is another matter. Any news on that 4 goon ECS speed?