COURSEPRESS PRO : Is it possible to allow access to only one course to visitors (no account) ?

Hi,

I would like to know if it's possible to allow access to only one course to visitors (no account)
Others courses are sold with MarketPress.

I would like that only the demo course would be readable by visitors without any sign up nor login ?

In my scenario, visitor is in my funnel, and I would like 'force' him to view all the demo course before to create a (PROSite) account.
And the special link to signup is in the last dripped module of the demo course.
By this way, visitor must view all the demo modules course before he could signup with the link given at last.
Thus in this scenario, user mustn't have any account and should be a true visitor.

Thank you in advance.

Boll