Hello,
If you will add new fields in Vehicle manager - that Yes you will need go through these files and database
But best way, check ours fields, select what you need, what you no need - and all fields what you no need use for self. Now You may simply rename all fileds what you no need with help language file
Also if you need some custom version with some special features - you may write to OrdaSoft support form and order exactly what you need
Thanks,
OrdaSoft team