I think like aybe says, one step at a time, see what progress can be made.

Just about copyright, have a read of this tale of woe about a guy that made a Smurfs fangame for the Amiga using backbone
http://eab.abime.net/showthread.php?t=76750

Separately I had a poke around the PC version of Wipeout 2097 and the Amiga version of it last night. They both use the same files apart from some PowerPC loaders required for the Amiga version. The Amiga version was smoother and could be rendered in higher resolution but the data is the same. The PC version has BMP files of the images used, quite easy to view.