it has been said ppl have gotten BartPE to boot from usb keys, this should make it much easier to update than having to keep burning cds over and over again, i personally use cds as i dont have a usb key. I would suggest you take a long look at all the help files and manuals for BartPE to see what you want from it. I have personally tried both Ultimate Boot CD 4 Win and Reatogo and both are pretty crap if you want a decent fast PECD, they add an unimaginable amount of rubbish that you will most definately not use.