you may would like to try democreator or demobuilder, they create tutorials by taking series of editable screenshots. the exported file size of demobuilder is smaller than democreator, but only has a 256 color depth while democreator exports true color movies. you can download them by searching their name on download.com
about democreator: http://www.sameshow.com/demo-creator.html
about demobuilder: http://www.demo-builder.com

good luck