I have a feeling something's broken if ISO games aren't launching. Bin-cue files are made for CD games as they're smaller, but if you really don't want to troubleshoot your problem, powerISO exists. Not sure if it's actually useful or not though, so do some research before installing it first.
"NintenDON'T sue me please haha"
I have a Mac and use OpenEmu. PS2 games in ISO format will not play, but Bin-Cue formats will. If anyone could convert the Power Pros games to Bin-Cue it would be greatly appreciated.