This version will work with ScrapBook Plus or with ScrapBook with XSidebar for Seamonkey but not with ScrapBook version 1.4.x or higher because of API changes in the original ScrapBook version. So don't use this add-on if you have installed ScrapBook version 1.4.x. Instead of ScrapBook version 1.4.x use ScrapBook Plus version 1.8.18.x.
You find ScrapBook for Seamonkey with XSidebar here:
http://xsidebar.mozdev.org/modified.html#scrapbook
You find ScrapBook Plus for Firefox here:
https://addons.mozilla.org/en-US/firefox/addon/scrapbook-plus/

Now compatible with Seamonkey Version 2.0 with XSidebar and ScrapBook (see: http://xsidebar.mozdev.org/)