Create a USB bootable Linux installation

We want to start an open source project. The project is a secure Linux desktop with the bitcoin-qt wallet. The end result delivered to us should be both a user ready .iso file for burning as live-cd and instructions how to install onto USB stick. You must also provide all files and live-build configs so that an open source community can move the project forward. We are assuming that using Ubunto is the easiest/best because it seems to work well with most desktop hardware right out of the box (specifically wifi cards/networking), if you have another idea for OS/Distro then please let me know, we are not fixed on Ubuntu The desktop/os should have no apps installed other than these bitcoin-qt wallet ([login to view URL]) Armory Bitcoin Client ([login to view URL]) Electrum ([login to view URL]) MultiBit ([login to view URL]) We want most everything else removed from the distro. no apache, no mysql, no ftp, no dovecot.... the list of things to be removed from the distro is endless. You will have to spend a little time with me checking what should be included and what should not be included, but this will be a very very light and super secure installation that does not need anything more than a core set of apps, networking and desktop controls. We will need normal desktop controls for mouse/keyboard/screen/wifi/ethernet but nothing for printers or any other device. I want to offer people the choice of KDA or Gnome