If you're looking to put projects online for display, the best way is to simply upload your students' projects to the Scratch website and embed the applet in your site, which can be done by copying the HTML code from the "Embed" option in the sidebar of your project page.
Offline
You could read this:
http://scratch.mit.edu/forums/viewtopic … 2#p1433192
Hope this helps.
Offline