Why would you want to load your MEPIS LIVE CD into a USB key?
Believe me, it is great as a RESCUE/BACK UP TOOL...it will let you:
a- recover your Windows files if Windows refuses to start (that's a life-saver!!)
b- clean viruses you cannot normally reach from Windows
c- browse the web securely without worrying about spyware being installed
d- burn your back-ups from Linux or Windows partitions (MEPIS comes with a CD-DVD burning tool!)
e- view and create all kinds of office documents from a computer that doesn't run Windows
f- use MEPIS on a PC that does not come with it
g- install MEPIS on that computer if you want to
h- make or modify partitions on the hard drive
i- lend your computer to your cat without worrying about possible consequences in your system
(well..to be honest, I must say that this one has to be tested further. NOTHING is cat-proof yet! :P )
So, how you do it? (I mean installing MEPIS on your USB stick, not cat-testing your system)
First, you need a MEPIS Live CD. I personally favor Mepis 8.0.15 but others are more comfortable with Mepis 8.5
Boot your computer with the Live CD. Once you have reached Mepis desktop, go to System/Mepis settings/MEPIS System assistant. It should look like this:
Plug your USB stick and follow these images...they pretty much cover the process...