Edit: Sorry, I've just seen that that facility is only available in the pro version at $249. It shows that it can be done but not, I'm guessing, at that price.
You need to purchase a "self-extractor program" such as Win-Zip. I've not used that app since the 90's, but I'm sure it still does that in the paid version. The user will have to click and allow "admin rights" to let in continue, but you need either WinZip or something very similar. (several solutions out there)
Hmmmm...only issue might be the end users don't have permissions to install sotware and an installer would probably be an executable wouldn't it?
Thanks!
The installer will have the necessary code to install properly, using UAC if needed. The auto-extractor would simply try to copy/move files to a folder.