NukeRoyal writes:  

The Fast,Safe and Easy way to make from your PHP-Nuke site a Pay-Site Today...

Some Features are:

Create Infinite Memberships/Subscriptions.
Set Access on modules,blocks for your created Memberships/Subscriptions.
Let Members pay the fast ,safe and easy way with Paypal´s Instant Payment Notification. After Payment instantly the member will be automatically approved.
Automatic expire system will autodelete subscribed users for the Membership/Subscription in question which date has expired and an email will be sent.
Send reminders.
With Un/Installer and filechecker.
Easy overview of all -Royal- members, transactions made , settings ,etc.

[Admin Note: This is a paid script]

NukeRoyal

NukeRoyal has Royal Modules for PHP-NukeNukeRoyal

NukeRoyal has Royal Modules for PHP-Nuke