I'm a new aMember user and am in the middle of figuring out how to setup and configure everything. It's a bit intimidating! My question concerns integration with Authorize.net. My current website has a number of Wufoo forms and other custom forms that are already integrated with Authorize.net. My webhosting account does not have SSL so I'm not using or paying for Authorize.net AIM or CIM setups. I believe I'm currently using SIM integration for my current forms. My users fill out the various forms, then they are sent to payment forms hosted by authorize.net. When I created my current Wufoo and custom forms, I was only required to submit my authorize.net LoginID and Transaction Key to integrate with authorize.net. This all seemed simple enough. When I'm trying to setup aMember integration I'm using the authorize plugin (not the AIM or CIM plugin) and it's asking me to setup a "Relay Response URL" and an "MD5 Hash." If I do that, I'm concerned that it will jeopardize my other forms (that do NOT have a Relay Response URL or MD5 Hash). Is that correct? Are those optional settings? Can I setup the basic aMember authorize plugin (not the AIM or CIM plugin) in a way that does not interfere with my currently integrated forms? Please keep in mind that I'm a complete newbie about these terms and I'm largely unfamiliar with authorize.net integration methods. This is all pretty new to me. And I'm a VERY small business, so if I can avoid having to pay extra for AIM or CIM that would be better for me. I appreciate any help!