I love to write complex scripts and very interested in your offer. I am on vacation tilll 10th of January — have time for your project, but until I get to work, I can work only in CS3 (Windows). Anyway, I can start in CS3 and continue in CS5. If you don't use any stuff specific to CS4/5, I can write the whole script in CS3.
You can get in touch with me by e-mail: kasyan [at] voliacable [dot] com