Wish I could help you on the Comic Book Theme from PrE, but that was added since my old PrE 4. In very general, jaded, PrPro-terms, I found the Themes/Instant Movies to be highly limited, and, well a bit hokey. However, for "comic book" maybe that would not be such a bad thing. I would post to the PrE forum, and also to Muvipix, as I'll bet that some users can give you the full run-down, so that you can either pursue that possibility, or rule it out.
Wish that I could help you more, but good luck,
Red Giant's Toon-It is what should do it but it's not compatible with CS5. I know it says there is an update coming 'Summer Time' but that's been there for months and now summer is over!!! I assume it's not going to be available unless you use CS4. Shame - they make such good stuff.
Just noticed they have a good new denoiser.