To assist modders in making mod's I've updated the G3d Viewer in Mega-Glest to also now show particles. I'll bundle the updated viewer in the next couple of days (Elimnator is testing it) but it will allow you to edit a Unit's particle XML files and just press a Key in the viewer to see the particle working with a given unit. This should greatly increase the ease of adding particles to Units.
Any additional suggestions are welcome as to how to improve the viewer. (I won';t spend too much time in the viewer right now since we are getting ready to plan for a new multi-player release first).