I've been searching around everywhere for a solution to this and unfortunately have not found one yet. It seems a number of other people are also trying to get the paid content module to work on a specific piece of content within a post/page rather then the whole post/page itself. Oddly I havn't come across the idea of using a shortcode to satisfy this. Would it be possible to create a shortcode to wrap around whatever content you wanted users to pay for? It would go something like this...
[paid-content] You're paid content would go here. [/paid-content]
It would behave exactly the same way as it does now but offer much more flexibility on what content could be paid for. Please somebody can you help with this??