Tip: Getting back to where you left off in iTunes

This may be old hat to those of you who spend every waking minute in iTunes, but for the rest of you, here's a useful tip I picked up from MacCast's latest podcast. Let's say you're listening to your favorite tune, and you hit Pause so you can listen to another track or take care of some other business. You can get right back to the spot where you left off if you've done a little prep work to activate bookmarking in that tune.

Ctrl-click the tune in your iTunes library, and choose Get Info from the contextual menu. Click the Options tab in the window that opens, put a checkmark next to Remember playback position, and click OK. From now on, whenever you pause that song, hitting Play will take you back to the point at which you paused, rather than to the beginning of the song.

This works great on the songs on which I've tried it, but it gets tedious doing this track by track. Has anybody figured out a way to batch-process multiple tracks so they'll all work this way? (By the way, bookmarking seems to be automatic in iTunes 6 for MP3 podcasts, but not for all audio files.)