The only bootloaders you have to change are the one V3 and the Go 710. For both you use the bootloader 5.5022 and then you can use SDHC card to a maxium of 16 GB. When updated the bootloader then use a SD card from 2GB or less (that is only once) after that you can use the bigger SDHC card from
at least class 4.

p.s
Without updating the bootloader you can use SD cards till a maxium of 2GB