GCN How to flash Viper chip with cobra 2.1 bios and plugin?

butfluffy

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i would like to flash my original non extreme viper modchip to 2.1 with a plugin and be able to use the plugin to launch swiss from sd card so i wont need to use dvd to launch swiss.
i have some questions if anyone would be kind enough to help.
1. i know that the flash space in the original viper chip is very small so what plugin will fit in the space. i think i found the answer to be sdload but i can't find enough info to be sure.
2. how do you go about adding the plugin to the bios? do you add it to the bios image somehow and then flash it?
3. the cobra 2.1 bios comes with multiple vgc files. how do i find out which one i should use? the files are as follows.
COBRA21.VGC ;Cobra 2.1 BIOS
20010608.VGC ;Cobra 2.1 BIOS preloaded with GCOS external drivecode for drive 2001/06/08
20020402.VGC ;Cobra 2.1 BIOS preloaded with GCOS external drivecode for drive 2002/04/02
20020823.VGC ;Cobra 2.1 BIOS preloaded with GCOS external drivecode for drive 2002/08/23
any help would be great.
 

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