I believe I removed it by replacing that menu section in the header.php with my own custom links to the login and the customer area pages.
Thanks, I'll take a look at that.
But keep in mind the following scenario. Let's say a potential buyer has been browsing and searching your site for the one image he wants to buy. Redirecting him from this image page to a login/register page might not be the best idea. A popup window which will disappear after login/registration is probably more sales efficient.
I believe that (by default) the registration redirects to a WordPress Admin Profile page, so that is already an issue.
At least the customer will see the area that he needs to fill out for registration. With the popup, the customer might not see where he needs to register and leave in frustration.