Hello Van.
Did you findt the page on creating pdfs from seaside?
http://www.seaside.st/documentation/pdfs
I've checked the link there. The download link doesn't work anymore (the server is claimed to be down). There is a version of SPDF in
http://www.squeaksource.com/Officious
The SPDF license is not MIT.
Stephan Eggermont
beginners@lists.squeakfoundation.org