form validation to acceptance of terms to secure download of file

I've been asked to create the following steps.

User fills out a form with mandatory fields, must agree to terms of service on a separate page and then is permitted to download a file from a secure location.

I need help understanding the general steps that must be taken (does the form stay open while the person accepts the tos?) and how does completion of this allow access to the secure area?

It would be lucky if someone knows how to do this using Drupal, I still need  a general overview of this process with or without that.
linqueAsked:
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hernst42Commented:
In genral I would do it like this and seen it on various pages

1st page have the fields to fill out with a button "Read licence" which goes to the 2nd page
2nd page check the fields if all mandatory fields have been filled show the licence with a button "Accept" which will got to the 3rd (downloadpage), else show page 1 again with notice to fill out fieds.
3rd page send the download if "Accept" was clicked

Sorry no knowledge with drupal.
linqueAuthor Commented:
how do i make accepting the terms allow entry to a page that is otherwise secured?
hernst42Commented:
sorry, don't understand that question. Please describe it a little bit more I don't get it from that context.
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oliverpoldenCommented:
Hey, I found these two links to modules.  They look like they should do what you need: http://drupal.org/project/legal http://drupal.org/project/dot_disclaimer

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linqueAuthor Commented:
those were *really* helpful - thanks.  
oliverpoldenCommented:
Glad I could help!  I've started building a site for building websites with Drupal, you may find some more helpful stuff there: www.e3m.co.uk
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