Updating VBIOS on GX660

Hello.



excuse my English but I am from Denmark.



Can someone explain how I update my VBIOS from dos.



Im having problems with fuzzy screen display when i connect a second monitor, and as far as i can see, MSI newest VBIOS should fix this.



I've made a bootable USB key, using the HP USB boot utility program, but do not know how to go further.



So if anyone has experience with this, please make me a guide, that is like foolproof.



Thanks