Here's something that I have hacked together yesterday and today. It
does not fit on a page (unless you used a really unreadable font, which
I'd consider cheating :-), but it has a custom inspector and some very
nice goodies thrown in.

It's about 14K, here's the URL:
http://www.heeg.de/~hmm/squeak/System-Prototypes.st

Hans-Martin