I got everything working with 24 / 25 fps between Sony Vegas Pro and Adobe Premiere. The DVD version shows all of the old animation too. Old, because I've been working every night since last weekend creating new effects at 24 fps with Particle Illusion and using the Fx tools with Vegas Pro to fit them into a new video layer right over the live action. The preview screen shows it show work out very nicely. The teleports, warp drive, explosions, and laser fire are better than before. This weekend, I should have Video Copilot. I'm already making use of the bonus pack.
Slow rendering time for effects means a newer computer with a faster processor and bigger hard drive with a greater percentage of free space will make a big difference. So far, my 35 minute production with effects included takes 2 1/2 hours to render. It slows up for rendering the effects and speeds up for just straight editing scenes.
I remember back in the year 2K when we were making Very Special Agents and editing on a Mac AVID with special accelerator boards with After Effects, the angel zapping the vampires with lightening scene took over a day of non-stop rendering to render the one effect in After Effects. The longest scence to render in IC2 is Artemis descending onto the alien planet as a ball of energy and transforming. That takes nearly an hour to render. It will probably take longer now, because I'm adding more turbulance effects.
These days, rendering HD special effects with anything less than a dual core 2 is insane. A computer would probably be rendering all week ... at least.