Hi Matt,
Its a bit complicated. Usually gpedit is used by system administrators to
maintian security policies over a network, and the options that you have
available in gpedit depends on your windows version and the Administative
Templates that you have installed on the machine.
See the Group Policy newsgroup
news://microsoft.public.windows.group_policy
I think the registry key to switch the button on/off on the Internet Options
dialog is
HKLM or HKCU... "Software\Policies\Microsoft\Internet Explorer\Control
Panel"
Value = "Cache" dword.
Regards.