remastersys - Remaster Ubuntu to create LiveCD that has both Unity and GNOME Shell

Possible Duplicate:
How to customize live Ubuntu CD?

Ubuntu 11.10 release is just round the corner, and for the first time, I need to remaster the original LiveCD as per my (including most of the colleagues) needs. I'm totally new to remastering Live ISOs and all I know is that I've just "heard" about remastersys which can be used to do this.

Below are the things I'll tweak with original ISO.

• Add GNOME Shell (3.2) as desktop environment choice, alongside shipped Unity. (most important)


• Install all restricted Codecs for media playback.



• Set default theme for GNOME Shell (along with wallpapers, icons and GTK3).


• Include Chrome and other similar apps with standard installation.


• Install some handy GNOME Shell extensions.


• It should still be a LiveCD (DVD in this case).

I'm not bothered about increased size of ISO due to above bloat that I add.

So, these are my needs, I can do all sorts of customizations but don't know how to include that in ISO, and that's where remastering comes into the picture. So where should I start from?

Note: I'm not bound to use only Remastersys, any other similar app will also do for me as long as it accomplishes above requirements.