Yes, I believe X3 BIOSes let you turn the 'VGA patch' on and off. But since guitarfrk doesn't have an Xecuter 3 modchip, it wouldn't be very useful in this situation.
But, if the X2 Config Live BIOS (which can also enable/disable the VGA patch) can be converted to BFM, or if there's a BFM version floating around, it could be loaded with Phoenix BIOS Loader. I don't know if this would work, though, so guitarfrk would have to try it at his own risk.