The original (downloaded) live Knoppix CD I used to generate the remastered copy boots up as user knoppix. But the remastered CD boots up as user root. I have not discovered why. But I am increasingly believing that the reason that the GUI will not start is not a memory or graphic problem (because executing startx WILL start it) but an .Xauthority problem. There is an .Xauthority file present in the knoppix home directory but NOT in the root home directory. My next step is to create an .Xauthority file for root before I burn the CD. I am not yet sure how I can do this.