You need the following mods:
Add VIN to 'wws_tlineitems' and 'wws_lineitems' tables with a width of 25. Then set these advsets:
TRUE VEHICLE,VIN
VALIDATESHOPPINGCARTRULE can take these values:
VEHICLE - it will check year, make and model
VIN - it will check the VIN field
VEHICLE,VIN - will check year, make , model and VIN as well
The validation occurs when the customer clicks checkout. IF the data are incomplete, we display a page with SKU+description and fields for year, make, model, engine, and VIN, and ask the customer to provide as much info as they can. This won't stop them from checking out; it will just ask them to provide that info.
