Hmmm actually it seems that we could migrate the database to MySQL 5 (currently it is v4) but for that I have to recreate the database (i.e. I will have to copy all the data to the new database), so I'll have to close the site for that operation.
I'll do some tests and probably make that change on friday or saturday. It will also solve searches on special characters (e.g. currently if you search on "Zundapp" it does not find "Zündapp").
For Skoda it works only because I added a replacement of the name when it is written without the inversed ^