QUOTE(cookie man @ Jul 1 2008, 10:16 PM)

I have recently read about Project 4, which is a full XMB replacement, so I was wondering about:
How does XMB work?
Where are the XMB files located?
And if there is the source code, where could I get it?
I can't answer how it works (you'll have to ask Sony) but the files will almost certainly be stored in flash0 and unless you know how to reverse-engineer them I really doubt that you could get the source code.