:( I looked around a bit and all the links lead to the penumbra site map, with the error ''you lost?''. I can't find any other links, did you guys take them down? I hope this question hasn't been asked a million times or I am just doing something wrong...
I'm not sure if this is exactly what you're looking for
http://frictionalgames.com/penumbramod
[link]http://frictionalgames.com/penumbramod[/link]
(Too lazy to see if it auto-makes a link, so I'm putting 2 down)
Thank you very much, i'm very excited to modify penumbra, after having beaten the tech demo.