'Percentage on price' Shipping Plugin for Virtuemart

This shipping plugin is a modification of the original plugin of weights and countries of VM, but that allows to enter a percentage on the total price of the purchase of a fixed total. Of this way will be able to establish some costs in function of the final value of the cart.

It works with Virtuemart 2, VirtueMart 3 and Joomla 1.5, Joomla 2.5, Joomla 3