You are making this way harder than it needs to be. You don't need to uninstall any drivers. It is better to leave the latest driver installed. If it stays installed, there in no need for Windows to download it.
What you do is download, install and then choose the v3.2.0.0 driver. The miklor.com website has a guide for doing this. See steps 6 though 11.
http://www.miklor.com/COM/UV_Drivers.php
As you can see from the attached picture, I have 4 Prolific device drivers installed. I can switch between any of them at will by using Device Manager. By choosing the v3.2.0.0 driver I can use every Prolific based programming cable that I have (genuine chip or not). By choosing any of the newer drivers, I can determine if the Prolific chip is genuine or not (if it stops working, it isn't genuine).
Jim KC9HI
