OldHary

Hello everybody, im new in this Forum and wanted to ask for help. I got an old Clevo p150hm with a bricked hd6990m. Now i replaced it with a msi gtx570m 3gb, and i got windows working, but the card is not shown in the Bios and i cannot install the card. I searched a lot but i am affraid of flashing and bricking the card. There is no clevo vbios for a 570m and also there is just a vbios for gtx670m with 1,5gb. What do i have to do now?