Thats my only advice, as that folder shouldn't be "protected" or whatever, since vista basically is 99% Digital Rights Management (DRM), 1% OS.
Off-topic I know but protecting folders has nothing to do with DRM.
Protecting system-wide folders is fundamental security, and it's nothing new to Vista. The only difference with Vista from previous Windows versions is that the default user account created is no longer an administrator account which has access to these folders. This is a very good thing. It should be considered a practical security flaw in XP that the default account created was an administrator account because, as is evident from this and many other threads on this forum, people don't have a clue about security and even those that have a bit of an idea are often too lazy or arrogant to secure their OS by creating non-administrator user accounts for everyday use.