AbleCommerce Shopping Cart Software

Thanks. While helpful, that isn't exactly what I'm looking to do. I can't speak for all gateways that exist in AbleCommerce (GoogleCheckout, Authorize.Net, etc.), but for Payflow, there are comment fields that can be viewed (after a payment has been made) in the Payflow invoice page (paypal.com). I ...

I'm looking to add some sort of invoice comment to a transaction within the AbleCommerce checkout process. We're currently using PayPal Payflow Pro, but obviously getting this to work for any merchant gateway is best. This field does not need to be stored. It will be handled like a custom field that...