There is no need to uninstall anything. When you enter the XPs product code, it will disable Resource Manager, Installation Manager, Load Evaluators, etc... At that point there is no legal or licensing need to uninstall those features. However, you can re-run the installation and deselect the features you want to remove by using add/remove programs. Just select your current MF installation and select modify installation. I do not see the need to do this though.