Can help on the puppy stuff but installing is harder than windows. This is the thread that the puppy image came from:http://webdt.org/forum/viewtopic.php?f=3&t=319&hilit=matt+puppy+image#p1784
This is a how to that I wrote on installing. http://webdt.org/forum/viewtopic.php?f=9&t=228
DD is the tool. Its a command line program that wil make a running backup of a computer while in use with users logged in and all. Although the images are .img files they need to go back on the WebDT using DD.
Its pretty easy once you get the hang of it. Be happy to help on chat or whatever needed to help you got it on.
Let me know,
PS the puppy image should say webdt in the title. If not its not the right image. If you need a copy I have one.