Found a post that might give a clue how easy it is to create packages in Foresight:

I’ve heard that when the RedHat developers present new open-source
packages to their local Linux User-Group, before the meeting is over
one of the Foresight people will have downloaded the source, created a
Foresight package, uploaded it to the repository for folks to get, and
it will be available for anyone to use. It’s explicitly designed as a
package management system with very little overhead to creating new
packages.

Taken from here: http://bloomingtonlinux.blogspot.com/2009/11/re-blug-newbee_5698.html

Well, I don’t know if its true or not.  :)