Open your emulator SRAM file (8,192 bytes) and paste 00002000h to 00007ff0h to the end of the file (under line 00001ff0h). Save and rename to sfxxxxxx.b0x. This gives you a 32,768 bytes file that will work on your GDSF7!
You will need to copy 00002000h to 00007ff0h from each games BRAM you want to convert. Its diffrent from game to game.
I done this with 6 diffrent games I had emu saves for and it worked every time! I was using Snes9x .srm.