Difference betwen a Persistant disk image and knoppix config

[dvryknopper]

using saveconfig simply saves the current settings in your knoppix environment so that those settings can be recreated later, correct me if I am wrong, but I believe the persistant disk image is what copies the whole operating system and the current enviroment settings to your hard drive, to do that on your thumbdrive, you would need a thumb drive with a greater than 2 gig capacity.