[Fedora-livecd-list] building Fedora 16 Live CD remix

I'm building a live-CD remix based on Fedora 16. Last one I built was with Fedora 14.
I like the look and feel of Fedora 14 so, is there a way to force Fedora 16 into fall back
mode when I build this remix?
Does anyone have any tips on modifying the default look? I would like to change the splash
screen, login screen and default background.
Does anyone know of guide on moving from Gnome 2 to Gnome 3?
What does systemd affect in the remix process?

Thanks,
WB