VirtueMart to display products from another database?!

[oxido]

Can VirtueMart be modified so that it works with a database other than joomla?
I want to install VirtueMart on a site made with joomla, but the products displayed, is in another database, which has nothing to do with joomla, just as both databases are on the same server.

Soo.. it posibile?
and if is it, from where to start?

The project I want to be done exactly as shown.

TNX, and have a nice day.