A little googling:


"Once you have all the screenshots, import all of them as a sequence inside Windows Movie Maker, Adobe Premiere Pro, Camtasia, QuickTime Pro or any othervideo editor– just bring down the image transition time to 0.1 second (or less) and export the animation as a GIF or any video format. The results are always pretty amazing."


http://www.tucows.com/article/2058


It looks fairly easy to be honest Good luck lad