I am trying to update my Dell Dimension L700cx from Ubuntu 5.10 to 6.06 using a CD created with the download. I have my boot sequence floppy,CD, HDD.  With CD in drive the system still boots through to the current version.  One web site suggestion is to copy sbm.bin to a floppy and use that the start the upgrade process. I formatted two floppys, one with Fat and one with ext2. Using the file browser to find the file, I then opened the archive dropdown and chose Save As. The error mesage is "given UDI in not a mountable volumn". I then used a terminal to "mount /media/floppy".  The second attempt to Save As resulted in the error mesage "Archive type not supported".
I would appreciate help on what to try next.  Boyd