Got my computer back up and rescued my files.
Finished off the Megadrive Game editor and put it on my site. You have to be logged in to use it and it can be accessed using the FBA MD Games link under the Tools section of the right hand menu.
It should be fairly simple to use. The driver can be auto generated from the data, so if you want to see more Megadrive games in FBA then test them and update the status.
Please only amend things properly. I'm taking the precaution of logging all changes (including IP address, username, date and time) and also doing daily backups.
If this can be used properly we can get some more Megadrive games in FBA and have some good info as to what is wrong with others.