I'm assuming that when the BIOS flash died, it partially corrupted your BIOS, but left enough running that the floppy works. If this is not so, then my advice is worthless, however in that case, so is the advice of the previous respondent.
I suggest you go to another computer, login to the MSI site and look around for a non-live BIOS flash utility as well as a copy of whatever BIOS you should be using. There is no reason to believe that both the flash utility and the BIOS itself will not fit on a single floppy. (Most BIOSes are less than 512 K in size.)
Build a BOOT floppy, put the flash utility and the BIOS on it, reboot your system and sacrifice a virgin to the Computer Gods in hopes that everything will work. (Or send her to me.)
In the case of BIOSes, unless you are ABSOLUTELY CERTAIN that you have a problem which can only be fixed by reflashing the BIOS, you should never reflash the BIOS. All too often people who do this wind up buying a new motherboard. I hope things work out for you.
Toad