You mean manually select it an play it in ZC? You never could. You have to play through them. You start out on 1st.qst. If you beat it or you enter your name as 'Zelda', then you play the 2nd.qst. If you beat that or enter your name as Alpha (the winner of the 3rd Qeust contest), then you play the 3rd quest.
As for loading them in ZQuest, they are password protected so people can't cheat.
