This program let's you play with the SpriteEmitter type in the SpiteBehaviors module.
http://www.scottshaver2000.com/forum/viewtopic.php?t=141
new version: more controls
note that this is not your typical particle system stuff. It works similarly but the settings are intended to help you set up a SpriteEmitter from the Sprite Behaviors module. The blend mode changing doesn't work yet.
blend modes work now, except for a possible bug on the mac version of maxgui.