> I will have access to a working Euro board soon, can I dump the ROM from that and
> burn a new one for these dead boards?
You need to get a new Timekeeper (or hack in a replacement battery for the dead ones) and program it with the data from the working board.
> Also, does GT Club suicide at all? I have a dead one here too but no info on it seems
> to really exist online..
Guru indicates it's self-repairing if the Timekeeper is replaced. So if yours is dead it may have something else wrong with it.
> Lastly have a Fighting Mania that says it has a card error.. does there exist a boot
> cd that I can reinitialize the flash with?
At least for the version we have dumped, Fighting Mania can re-initialize itself if you flip the appropriate DIP switch to boot from CD instead of flash. (ie, there is no separate boot CD, the gameplay CD also can do the setup).