Thanks to everybody who replied. We're going to contact you with the detailed specs of the system and some other variables.
Ben, I think the answer to your remakr must have something to do with "open-source psychology" and/or the difference between a solution and a toolkit. For me this was an area of intense suffering, because several of my former bosses (non-techies) didn't understand for example that you only have to adapt a CSS in order to change colors and even the look and feel of a web application.
And we techies frequently don't seem to get that customers need solutions...
Bests,
Frank
www.project-open.com