well it was never designed to be used with _levels.. and 'thought' others have had success putting in the _level1 value in the params.. but maybe Im wrong?

this seems to work..although its from a button event.. (and has quotes around it)

PHP Code:
button1.onPress = function(){
    ezLoader2.startLoad("image1.jpg", "_level1");
} 
go figure.. I thought someone a while back had posted on this on my wordpress blog.. but either I erased..or Im nuts..LOL