Thanx for the answer, I will customize the default.php file as you suggest.
I need further customization for my second issue. The pricing tab in Virtuemart Configuration Tab, offers some options which i want to logically alter a bit. For example, I want the discount amount to appear only where there is a discount, and as I told you I also want to present to the customers the BasePrice (Initial price) together with the SalesPrice after the discount is applied (if there is a discount). When there is not a discount I want only the Baseprice to appear since BasePrice= SalesPrice and not both of them as it does, it makes no sense. In other Words I need to apply an IF function to check whether there is a discount or not, and only then present both BasePrice and SalesPrice. In this case, after all that, I would also use some CSS as I told you to apply a diagonal line to the BasePrice (the price before the discount to appear like erased).
I would appreciate some technical help, thank you.