no, when you use PLAY from an event, it appears to knock out the current item, and play the item at the top of the queuelist.
if your alerts are for a fixed duration, i.e. 15 seconds, then you could
PAUSE!
Play track from folder or category on an AUX player,
WAIT X seconds (the duration of your alert, ie.. 15 seconds)
then UN-PAUSE! (which would continue playing the track which was paused.
the tricky part is if you don't have a fixed duration, you won't know how long you need to delay while the track plays in the AUX player.