Thanks for the suggestions, keep them coming!
I'm not sure why you think #2 is not possible right now, unless you're using particleIllusion SE. particleIllusion 3.0 works with HD res projects just fine -- you can scroll around the workspace, and rendering occurs automatically in pIRender (the standalone renderer) when needed for high res output.
Alan.
....................
Alan Lorence
Product Manager
GenArts, Inc.
http://www.genarts.com
http://www.wondertouch.com