Vista Ultimate edition: How to UnInstall Terminal Services?

Hi,
I've successfully installed Windows Vista Beta2 with an "Ultimate"
Product-Key on a VMWare 5.5 virtual machine.
Everything goes fine, but i'd like to uninstall the terminal services, which
are installed by default.
I haven't figure out a way to do so. In Windows Server 2003 i can go to
Add/Remove programs in the control panel and then uninstall TS from Windows
Components, but in Vista, under "Turn Windows Vista features On/Off" there
isn't the option for TS.
Is it possibile to uninstall or disable the terminal services on the
Ultimate edition of Vista?
I have to test some applications on Vista, but these apps requires the
terminal services to be disabled (and to check the presence of TS, these
apps rely on the registry key
HKLM\System\CurrentControlSet\Control\ProductOptio ns for the string
"Terminal Server"; if i manually change this value with regedit, Windows
automatically restores it)