Important info for those doing upgrade 1.4 and 1.5 at the same time:
The upgrade files are numbered 1 to 4, but the files 3 and 4 (1.4 upgrade) should be used FIRST, then 1 and 2. You will notice by the file names that disks 3 and 4 are the ones for the 1.4 upgrade and 1 and 2 for the 1.5 upgrade. The Taiyo site who originated the files do not give this instruction. If you have already installed 1.4 then only disks 1 and 2 need to be used.