OK I'm having trouble w/ GB. Every time I play back my song it will stop and say: "This song has too many tracks, effects, or notes to be played in real-time.To optimize performance, see the 'Optimizing GarageBand performance' page in GarageBand Help." Now I've gone under 'Optimizing GarageBand performance' and I've done the following things: •Open System Preferences, click the Energy Saver tab, click the Options button, then choose "Highest" from the Processor Performance pop-up menu. Click the Sleep button, then turn off "Put hard disk(s) to sleep when possible. (I don't have this "highest" setting on my G4 Power Mac!!! So I can't do that!!! Any ides here?) •Quit other open applications. (I've done that. Didn't help) •Mute some tracks in the song. (Not an option. I need to here them all.) •Turn off some effects, especially more complex effects such as Amp Simulation. (Also not an option. I need to here them all.) •If the song uses many Software Instrument tracks, convert some Software Instrument regions to Real Instrument regions. To learn how, see the "Tips" page. (Don't use 'em.) •Choose GarageBand > Preferences, click the Audio/MIDI tab, then click the "Maximum number of simultaneous tracks" button in the "Optimize for" section. (Did it.) •Choose GarageBand > Preferences, then click the Advanced tab. Choose lower settings from the "Real Instrument Tracks", "Software Instrument Tracks"or "Voices per instrument" pop-up menus in the Advanced pane. (Doesn't apply.) •FileVault can cause reading data from your Home directory to be significantly slower. To improve performance, open System Preferences, click the Security tab, and turn off FileVault, or move and keep your songs outside of your Home directory. (Done.) •Your computer can read data more quickly from its hard disk than from removable media, such as a CD or DVD. Copy songs to your computer's hard disk before playing them. (Doesn't apply.) •Some external hard disks may read data more quickly than your internal hard disk. If you have a high-speed external hard disk, try copying songs to it before playing. (don't have one. Should I get one?!?!) Also, I've cleared out Pics, MP3, and other big files to try and make more room, but I'm still getting this message! What should I do? Buy more RAM? Buy a external HD? Help!!! Thanks in advance!!!!!