I'm honestly not sure what you're talking about. I used diskpart.exe to create a partition and lable the SD card, then using Windows I formatted it to FAT32 with 4096 byte allocation (I think), then from the laptop's hard drive I ran the Ubuntu installation and installed it into the SD Card, from there I attempted to boot into it and it worked using the laptop. So I never saw any option that mentioned a boot flag, VFAT partition or any of that.
I believe I have some old 700 mb CD-R`s lying around, but nothing fits on those, or is there a Linux distro that does?