Make game use different save file

[Latias4Ever]

I have two ROMs of Pokémon XD, one being the normal game, and the other being a hackrom, however when I play the hackrom, it accesses the save file for the normal game, and I don't want that, I want the hackrom to use its own save file. Is there any way to change how Dolphin accesses the save file for a second version of the same game? Changing the Game ID didn't do it, neither did changing the Internal Name of the game, and I can't find anything that answers this question, either. Has anyone managed to do this before?

[JosJuice]

If changing the game ID in the disc header didn't do it, you'll have to hack the game's code.

[Latias4Ever]

I booted the hackrom after changing its Game ID in the header, and it kept reading the save file for the normal game, so yeah, I guess I'd have to do that, which I can't, so I guess I'll just have to delete the save file after backing it up.

[Aleron Ives]

The simplest way to do it would be to have a second copy of Dolphin that uses portable.txt to keep everything isolated from your main Dolphin build.