I've installed iTunes 9.2.1 on my iMac G3, because it's the last version that supports Mac OS X 10.4.11. When I tried to launch it, I got the message that it requires a G4, G5 or Intel processor. Now that it's installed, how do I go about uninstalling it and downgrading, or forcing it to work? Forgive any spelling or grammatical errors. My phone's keyboard is acting loopy.