Any combination of maps on your SDHC card is possible as long there is a meta code for the map avaialble
I've sent you already all possibllities, all USA maps and Canada and Mexico as well.

P.S.

Press the on/off button as long till you get a black screen with all the information about the GO 530
Watch which Bootloader is in use at present, when it's above 5.5022 you may use already SDHC cards up till 32GB

P.P.S.
More or less the same and even more information you're able to read in the file ttgo.bif on your device.