where to find ps_product.php in virtuemart 2.0?

[amanda mc donald]

Hi

I've previously worked with Virtuemart 1.9 and Joomla 1.5, now I'm using Virtuemart 2.0 and Joomla 1.7.

I've added extra fields in the "Product Information" page (admin panel Virtuemart) with the previous versions following the steps mentioned here:
http://forum.virtuemart.net/index.php?topic=59343.0
It worked well.

Now I'm using Virtuemart 2.0 and Joomla 1.7 and I can't find the files anymore .... it changed.  Where can I find the ps_product.php file (formerly in Joomla 1.5)?  Does it have a new name ?

I've managed to create a new field, can see it on my admin panel and can add data into it,but it doesn't save the new data back to the DB ... I cannot find the code where the data is inserted into the DB.

Please help!

Thank you
Amanda