Try installing lite then launching them. Lite should work with discs. I've had it installed for a while and my discs always work. If they launch, they should be able to be ripped. After they're ripped, you can switch back from lite.
In your apps folder, try copying the GX folder so that there's two. Have each load a different port. In the meta.xml, edit it so that the titles are different in the Homebrew channel so you know which one is which.