First of all I want to know what's called a Shell Replacement. Is it a new GUI for windows or does it also handles file processing and memory things.
I've really NO idea on where to start with a shell replacement. Do I have to overwrite explorer, or is it just an app that runs next to explorer only 'skinning' the taskbar and stuff.

I know I won't finish it, but I'll come across things that may inspire me on new progs.

And is something to like this
http://www.planet-source-code.com/up...2118115322.gif
Hard? Will it take lots and lots of time or is it just the making of the images wich takes up time

And the last q. Will my Shell Replacement make Windows unstable? and does it use lots of memory (since it's VB)