I found this add-on (http://www.zen-cart.com/downloads.php?do=file&id=212)

AND...

I also see PayFlow settings in my PayPal Express module..
PayPal Mode
Which PayPal API system should be used for processing?
Choices:
For choice #1, you need to supply API Settings above.
1. PayPal = Express Checkout with a regular PayPal account
or
for choices 2 & 3 you need to supply PAYFLOW settings, below (and have a Payflow account)
2. Payflow-UK = Website Payments Pro UK Payflow Edition
3. Payflow-US = Payflow Pro Gateway only
So I'm a little confused.. I'm not sure if I even NEED the Payflow Pro for PayPal module, and need some confirmation.. Is PayFlow supported now with the native Zen Cart PayPal modules??