X3 can no more Flash

[scasi]

First i flash the X3 1959 im bank 1 to 4 then flash the backup with x2 4981 then i want flash bank 5 to 8 with another bios.
I vergotten to set the switches to bank 5 to 8 and flash bank 1 to 4 again
How can i flash a nes new bios without flashbios in the backup
I try it with evox and he sayed wrong flashtype.
How can i flash
please help thank u
Sorry for my bad english

 

[Cheb41]

Just a quick Question, why would you put a X2 bios on a X3 chip? Just wondering!