In the same exact spot except it's only certain games (like Republic Commando) that always get the "The game couldn't start. Try downloading the game again" error, whereas others (Sands of Time) will work on an initial boot, yet give the same error no matter what after attempting anything with any other OGX games until I do a hard power cycle.
Doesn't help that the MrMario2011 video on this is unusually vague about key details, such as under what directory structure exactly to copy the games over or what might cause any common errors. Honestly a pretty bad tutorial, though it also seems like Xefu Spoofer is held together with toothpicks and gum and everyone just pretends it isn't? Every thread on it I've found is full of answers that don't work, or just gets no replies like this one. Exceptionally maddening experience/waste of many hours of my life.