Do all of your work with the stage zoomed out a little in pI3 (so you won’t get 1280 x 720), then when it’s finished (or at least most of the work is) use pIllusionRender to render at full size.
[RiW SFX] “Also, after making a logo disintegrate (thanks to Evlis’ fantastic tutorial for this) how do I make the particles form another logo?”
I’d try making both logos disintegrate, with the particles ending up in about the same place for both. Then reverse the second sequence in your favorite video editor. You may need to add a “filler” emitter to help hide the transition. (I’ve never done this, but this is how I would approach it.)
Alan.
wondertouch