There's a more rewarding job to do: free this PHP imageboard code, it's a thousand times the size of SchemeBBS and it's used by a community a thousand time larger than the one who post here. They even give us the honor of their visit sometimes.
Yep, MIT license. Their admins and mods are the most chill people on Earth. as history proved. I'm sure if you find the slightest difference between the Git version of their PHP Imageboard and the running site they'll promptly tell you how to clone those feats. They won't mind sharing all of their Server side confs too.