I can't speak to PEP 2/3. I use PEP v1.1.20 exclusively. That being said, there may just be a couple key "HID-compliant" device drivers that you need to disable. Your touchpad will continue to work regardless. I'd start by disabling any "HID-compliant mouse" drivers that are present in addition to ensuring you don't have an external keyboard and mouse connected. Also make sure to look through the many forum threads here on this. They'll more than likely prove fruitful. Good luck.
LP Related Links: View my profile to access various links to key posts and downloads.