Here's a quote from over at SmashBoards.
Well, Bero made a program called
Stage Switcher.
You will need to get the .rels from the "module" folder of
this disc rip of the PAL discYou put the .rel of your choice in the "rel" folder, choose it as the base stage when you open the program, choose the stage you want it to be, and BOOM, you should get an edited .rel in the "edited" folder.