I want to go back to 1.2 and format my 4gb sd card. It shows 2 partitions with windows disk management unallocated 1gb and is the emunand and can't format 2.73gb I can use and format. How can I merge the 2 partitions again into 1? I tried Panasonic SD Formatter and it shows only the 2nd partition with 2.73gb. I ask because of the bricks I want to go safe with 1.2 firmware.