PayPal Recurring Payments using PayPal_Lib linrary

[eluser]KaBaDaBrA[/eluser]
Hi there,
I am urgently trying to finish off a project for a client and they require PayPal recurring payments. I am currently using the PayPal_Lib library (located: http://codeigniter.com/wiki/PayPal_Lib/).

How do I go about adding a recurring profile or what variables can I use int he form that gets posted to PayPal?

If anyone can steer me in the right direction of adding a recurring profile somehow it would be much appreciated. Thank you in advance!