how to add digital download behind shopping cart

Here is what I’m trying to do:

I’m not offering an actual download of digital products, but something very similar (in terms of security).

I use Logmein Rescue to offer instant (on-demand support). I have this implemented in a website already, whereas someone can go there, fill out a small 3 field form, click the “I want support” button, and it’ll prompt the user to download an applet that will connect with me (and I’ll see it show up on my admin console knowing someone is connecting and someone wants support). Sounds simple enough.

My goal is to hide this securely behind a shopping cart. So the user will have to input their credit card and all pertaining information, agree to the TOS, be successfully charged – then proceed to the instant support. I’ve been toying around with ECWID shopping cart and other WP plug-ins for shopping carts. All (or most) are great shopping carts and work with my merchant account for CC processing.

I am just having an issue hiding the page for instant support. Right now, anyone can go there and just bypass the shopping cart and proceed to get support. I can’t seem to figure out how to hide this page, secure it, whatever – so people can’t bypass the shopping cart.

Does anyone know how I can do this?

Thank you in advance for your reply…