StarCube is just a group that releases GameCube ISO's, At the current time Every Game has been ripped and is easily found on the net.

Just about all ISO's come bundled with a loader,

Here's a bundle with some detailed instructions on running GameCube games vie PSO hack, plus some related programs and loaders:

Oh, and for anyone looking for GameCube ISO's, please dont ask where to find them here.
C++ Should Have Been Called "D"