On the product , how do you remove the word "Desciption" from the top of the page ? ( I'm not a developer!)
Easiest way is to remove title is to edit the text using a language override, which is explained in http://forum.virtuemart.net/index.php?topic=113895.0
The constant is COM_VIRTUEMART_PRODUCT_DESC_TITLE which can be replaced with a blank string.
In the default VM2 layout the Description title is not at the top of the page, so it sounds as if you are using template overrides or a commercial VM template. This means that changing the language string may be the safest method, otherwise you will need to edit the template files.
Thank you. You are right, we are using a commercial template.