Change claim listing URL

If someone clicks the claim listing in the sidebar it takes you to:
?geodir_signup=true

I want to send that users to an informative page that explains what that claim involves and add there a link to the register page “if they want” to register.

The thing here is that the user has to know what claiming is, if its free, if it cost, what he will have to do, what are the benefits, etc…

Taking them to a register page with no info at all its not good as a user experience.

How can I change that link, so when the user claim a listing in the sidebar of a place, its redirected to my custom info page instead of the register/login page ?

Thanks.