To get particles into maps, all you need to do is go into Object Maker, then on that first tab at the bottom click EffectMaker. Click the particles tab and load any particles you've got in via that. Then head back to object maker and save the particle into a new group!
As for finding them, there's bound to be some on the forums, but also making your own isn't too challenging once you get the hang of it. c:
