You should have Map Version 2.xxx with Version 3.xxx below that
If you have version 2.xxx you have the version 2 firmware
Had you updated to Version 3 before trying to add the maps?
Try the V2.1 and 2.0 testmodes to boot into the system
As long as you still have the wince bin files it will load into testmode, you just need the testmode that matches your wince
Once you get in
Make a backup
Load the backup into the emulator
Run Ezrider ands see where it goes wrong
You can also try reloading the V3 update. The V3 update will reformat the disk and load everything from from scratch.
Cheers
34by151