Paypal IPN Conflicts

I’m using the s2Member which requires I set the Paypal IPN to the following URL:
http://www.MySite.com/?s2member_paypal_notify=1

In addition, I’m using wp-event-calendar (surprisingly uses s2member to sell their membership) which requires the IPN in Paypal to be set differently, to the following URL:
http://www.MySite.com/wp-admin/admin-ajax.php?action=em_payment&em_payment_gateway=paypal

I’m not sure how to best handle this. I was thinking a script or some sort of redirect. I’ve looked into Multiple IPN’s and there is little info out there. I did find a PHP script that might work here:
http://codeseekah.com/2012/02/11/how-to-setup-multiple-ipn-receivers-in-paypal/

We need to use both plugins and cannot setup multiple Paypal accounts for the same business (violation of Paypal policies).

Anyone know how to get around this? Would the PHP script above work?

Thanks in advance!
Shawn

Actually, I think i found the answer in an old thread.

I can set the IPN to use the one specified by the Events Manager plugin, and s2member will automatically set a unique IPN for each payment button created. Untested, but in theory this sounds PERFECT!

Can anyone confirm this?

Thanks!
Shawn