Yes you can, i send you 3 mod for this board, the v2 is made with modbin, but modbin break board sometime. This is why i made v1 and v3
Yes, when cbrom work, it correct the checksum, this why i don't understand why you release/insert GV3 module, if you want just correct the checksum and mod system bios, add/release an isa module for example, but don't touch GV3 if possible. Why put 2 string (Dell + Asus), you need to change more string after ?