Windows 9x Reg Keys

I have 2 questions re: the Win9x registry and Policy Template files. The first is how do I change a value in the (Default) value of key? If I use VALUENAME (Default), it will add another (Default) valuename with my data in it. The original will still be there. Also, is there a key that will prevent users from seeing only the control panel? The Admin.adm file comes with a way to prevent seeing Control Panel and Printers, but we want them to see the printers folder. Thanks in advance.