A bit of [unsolicited] advice:
If you want to be 100% sure that your "bootable stick" actually does boot in all computers (that support booting from USB devices to begin with), do
NOT create a "
persistent bootable USB drive" – that is, one that is able to save your settings etc.
I usually carry a persistent bootable [Ubuntu] stick with me, and a while ago I was asked to do an install on a eMachines [Acer, really] netbook.
D'oh. Didn't recognize the stick as bootable media. I created a "dummy" non-persistent stick, and no problems. Some netbook BIOSes are funny that way, it seems.