Remove username/password?

I need the registration on there so I can get the user's address info, but I don't want them to have to register. Where can I remove the requirement for username and password? I tried removing things like "required" from the input labels, but no luck. Could someone help me out?

I'm using the free version and don't have that option. Is there another way to do it in the code somewhere?

I actually went a different route and just used the authorize.net billing/shipping info, but I can't get the return URL to redirect. I put one in but it isn't working. I would like for it to just go back to my shopping cart after they pay on authorize.net, or to have it open up in a new tab.

After you click next in the shopping cart to complete your order, it transfers to the authorize.net payment page. After you put in your info and everything it gives you a reciept. All that is good but there is no way to get back to the site unless you hit the back button a few times, but that isn't very user friendly especially after putting credit card info in.

yes i did, but i'm not really too worried about it right now.