Where in the file structure will i find the php file which generates the pdf invoices for virtuemart 2?
Im trying to customise it for an insurance brokers website to instead send out the insurance documents as a pdf.
You can find the PDF generation section under.
in the front end compnents/com_virtuemart/view/invoice/
they are using the PDF section here iam using VM2.0.6 in its that section not working. so for my requirement is almost same to you i did it with DomPdf creation option. Create the PDF content first as HTML then easily convert to PDF.
You can find the Dompdf here
http://code.google.com/p/dompdf/source/browse/tags/dompdf_0-6-0_beta3/
create you own path for your requirement.