You could go about that a couple different ways, depending on whether you need the file download links to be expirable or not. If you do, then you can use our "bundling" feature to create a bundled product that issues links for both the redirection and the file download (which would each need to be set up as separate products first):
http://www.e-junkie.com/ej/help.package.htm
If you're not concerned about the possibility of buyers potentially sharing their file download links with others, you could simply upload the file to your own Web site and add a link to the file's URL (just like you'd make a link from one page to another) on a page where the buyer could access it. E.g., you could add that link on the webinar page itself, for buyers to click after they're redirected there, or you could add the link to the Message (HTML) field of the webinar product's settings in E-junkie Seller Admin, which would insert that link on the E-junkie-generated thank-you page (when you add custom HTML in this manner, we show the buyer a thank-you page with a link to access the redirection followed by your custom addition, rather than just redirecting them automatically).
