OK...for all us novice users. How do I install the patch and where do I do it? ::)
Thanks!
OK...this is what I did and it's working. Please, someone do tell me if I have to do more!!! Unzip the 4.2.1 and then replace the "uspsv4.php" with the file dated 1/3/2011 in your virtuemart folder on your server.