I'm looking to do something like the 'dispersion 2 photoshop action' in PhotoPaint. Anyone got any tips? link to action in body of question.

Check it out here: http://graphicriver.net/item/dispersion-2-photoshop-action/8929152

I just think it's cool and I'd love to be doing something with it.

Anyone have an idea where to start?

I'd pay the maker of dispersion 2 if it worked in in photopaint (or paintshop pro), but as far as I can tell actions don't transfer like plug-ins do.