I need to migrate a client's website from classic ASP (vbscript) into DNN. They have an extensive database which is used for storing bookings, enquiries, etc. There is also a hand built system which they use to manage bookings on the back end.

Some examples of functionality:
Itinerary planner which has a HTML form populated with data from the database, and when submitted, does a search for results and displays them on the page.

A survey with some form data populated by the database, which does some calculations when submitted, displays the results on the page, and triggers an email to be sent out.

Testimonials pulls directly from database and displays as part of page template.

I know for some elements like the testimonials I can use a module such as Xmod Pro to format and display data on the page relatively easily. However, I don't want to have to completely re-code other functionality.

What's the best way to move functionality from their existing site into DNN? Is there a module available which will let me paste ASP VBscript code directly in?

Cheers!