What version Box did you screw up? is it the same and you did a chip upgrade from X2.6- X3?
Try this:
Get on to XBINS and download a program called FlashX3
1. Download the bios you want to put onto the X3 and copy to the Bios folder In the X3Flash directory,
2. Boot with the X2.6 to the dashboad
3. Remove the 2.6 Chip
4. Replace with your X3
5. Launch the flashX3 program (once you burnt it to DVD or launch from the XBOX in the apps folder)
6. Search for the File you copy over to the HDD for the X3 (D drive folder called BIOS)
7. Flash The X3
Once you have a X3 Bios on you can the FTP in and Flash the bios on the other bank (5678) through the admin folder and you can then FTP over a new back up flash bios and flash that from the X3 CL
Bios you need if its V1-1.5 is X3_3294.bin
X3Flash can be found in the X3 Bios folder on Xbins.
Info From the X3FLASH readme:
Modified version of FlashX v1.2 to program the X3 mod.
Simply set the switches to 1Mb banks 1234 (on on off off on)
Load the bios from D:\Bios
And then you wont need to touch them again as you can control your banks
thru the software.
If you use Evox disable Evox IGR and TSR or this wont work
This is a quickly repackaged app - it works but its not meant as
anything "official"