I'm currently using Paypal Sandbox and a test version of my website (CB 1.9 and CBSubs 3.0 with Joomla 2.5) to revise my payment workflow. I want to use the Enhanced Recurring Payments feature with CBSubs so that subscribers can quickly pay with their credit card without needing a Paypal account. However, when I follow the CBSubs documentation's steps to enable ERP in Paypal, I still don't see an option to select the new button for recurring subscriptions in the CBSubs backend. Am I missing something, or is this just me trying to do something not supported by CBSubs?

Talking to a user on the Stack Overflow forum solved the problem. Here's the topic for anyone who wants to know: stackoverflow.com/questions/15348548/how-to-test-enhanced-recurring-payments-standard-on-the-new-paypal-sandbox