You can register the kixforms dll (classic and .net) with a start up script or deploy them with a GPO.
It would need to be either a GPO or something like RunNas or the user would need Admin rights. You can quasi reg the classic with Power User rights but to properly do it you should have Admin rights.
If the user has rights or you're using RunNas you can actually add checking and installing code at the beginning of your code and not run the rest until it is installed and it should work as I recall (have not done anything like that type of testing though in many years)
