Originally Posted by Aqua
1. As we use AlteredCart OPC, should we be concerned with a paymentID issue?
2. On the authorize.net side, would there need to be any changes in our account as we are already an AIM user?
1. Yes it's compatible with Altered Cart AND X-cart's OPC module.
2. No changes needed to Authorize.net account. They just see it being posted a different way but it all goes into your existing AIM account.
Do let me know though if you still have more questions!