PayPal "Auto Return"

Currently I do not have the PayPal "Auto Return" feature enabled. If I do enable it, will this interfere with LimeLM in any way?

Also, in your HTML form code for PayPal, there is an input field called "return" which gets populated with the $ThankYouPage URL from PaymentSettings.php. If Auto Return is enabled, will the $ThankYouPage URL still be used? Or is it overriden by the default PayPal URL as specified on their site?

I don't know. You could always test it. My guess is that the $ThankYouPage URL will take precedence over anything you set in PayPal. Of course you could set them both to be the same thing to take any guesswork out of it.