This specific binary is an AWARD-BIOS wich is clearly defined in its internal structure. So we can surely use a tool called cbrom and some web-wide knowledge how to do it. There are a few other tools I don't really know, some of the mods/admins in here are even developing little tools to manipulate BIOS.
Back to topic:
This board is slightly the same as the the AX1300 and you can get these PCIex-slot as a spare part and solder it onto your board and then use an fully compliant PCIex-graphic card!
If you still want to test our BIOS M613Z_19.BIN, the commandline switch for awdflash is /f to force it...
But beware, don't do it if you are not sure how to recover in case of any damage!