Confirmation before installing a wizard

Hello, maybe I am posting this in the wrong section but I’m not sure where it would fall on.
I have a custom wizard on the web and a zip file that points to the wizard when the user launches it under the program addons tab. Now my question is, or what I’m trying to accomplish is, how can I make it so there is a kind of a popup confirmation with a disclaimer that the user needs to accept before the wizard launches and starts installation.
For example, user goes to program addons and clicks on my custom wizard installation link. Once they click, a popup will come up and ask the user to confirm that they want to continue with the installation. If they accept then the installation will start.
There is something similar from tvAddons, I tried tweaking their script by changing the wizard url and directories to mine but it seems like the path they use is different and not just a straight path to a zip file like mine.

Does anybody have a working solution to this or can point me in the right direction?
Thank you Smile