This was a link to the Repository5. The files were previously hosted by the research group web site, but the repositories have now been moved to www.anyscript.org. However this is a very old version of the repository and it is not available anymore to download.
Could tell us where exactly you found the invalid link so we can fix it.
As for the abdominal presure model we will try to upload a description of it on the wiki of anyscript.org.