I saved this tweak (http://unattended.msfn.org/unattended.xp/view/registry/8/) in a .reg file, double-clicked it and added it to the registry. It was successfully installed, according to the message boxes but when I opened Accessibility options in control panel, the settings had not been changed.
Please, confer upon me the knowledge of the secret handshake or mysterious rain-dance required to make this work.
(I hate StickyKeys.)
