If you're trying to create a Mack Weldon account and having any trouble, you may have created one already. (If you've placed an order before, then you've got an account.)
If you haven't placed an order before, just click "Register" in the top-right corner of the site. (Or, if you've already added something to your cart, click "Checkout.")
Enter your email address and a password, then click "Register"—and you're all set to place your first order.