Don't know if anyone noticed this or not. There are 2 choices showing in boot menu of CD, "2" and "3". There are actually 4 possible choices, 1,2,3 or 5. Here is the contents of isolinux.cfg from the CD:
default 1
DISPLAY BOOT.MSG
SAY MENU: 2 No acpi 3 Choose HD (ENTER only or 10sec timeout for normal boot)
prompt 1
label 1
kernel vmlinuz
append root=/dev/ram0 initrd=image.gz PFILE=pup001-none-262144
label 2
kernel vmlinuz
append root=/dev/ram0 initrd=image.gz acpi=off PFILE=pup001-none-262144
label 3
kernel vmlinuz
append root=/dev/ram0 initrd=image.gz acpi=off PFILE=ask
label 5
kernel vmlinuz
append root=/dev/ram0 initrd=image.gz PFILE=cd
timeout 100
Since I already had 1.0.3 installed and wanted to do an upgrade, I chose "5" after booting the liveCD. After Puppy was running in RAM, I just did an upgrade from the fvwm95 menu.