QuickSilver gives you great power, if you want to cue up an ongoing song list. Let's say you're listening to your party shuffle, and you have the urge to listen to Queen's Greatest Hits, but you don't want to switch out of Party Shuffle mode. No problem! With QuickSilver, you can cue up any track, album, or a whole discography, into Party Shuffle, and have it continue on with the mix when your craving has been satisfied.
Open QuickSilver and make sure the iTunes Module has been installed. Now go to the iTunes Triggers page, and check the 'Search iTunes' command. You'll want to set up a distinctive but easy to use trigger. I went with a Mouse Trigger - hold down left-click for 0.5 seconds in the top right corner - but you can choose anything you like.
Now when you trigger 'Search iTunes', you can search by artist, track, or album, and then press TAB to open the actions. Down arrow to "Play next in Party Shuffle". You can even make this the default action.
Now whenever you have a craving for a particular song, you don't have to go looking for it in iTunes, and then restart your Party Shuffle when it's finished playing, you can just let QuickSilver make your life easier!