How to delete locations from the location history when creating a new appointment in Outlook?

"Slipstick (a great reference on all things Outlook) has an explanation on how to clean the whole list. Apparently there is no way to remove specific entries:

To clear the Location drop-down list
on Outlook appointments

Outlook appointments show a drop-down
list for Location, populated with the
most recently used locations added to
appointments. You cannot populate this
list with your own preferred
locations. You can, however, clear the
list by closing Outlook, removing a
value in the Windows registry and then
restarting Outlook. Always make a
backup of the registry before making
any changes.

For Outlook 2000, the value to remove
is:

HKEY_USERS\.DEFAULT\Software\Microsoft\Office\9.0\Outlook\Preferences\LocationMRU


Outlook will automatically add the
value back into the registry the next
time you set a location on an
appointment.

In Outlook 2002, 2003, and 2007, the
value is found at:

HKEY_CURRENT_USER\Software\Microsoft\Office\xx.0\Outlook\Preferences\LocationMRU


Replace the xx with 12 when using
Outlook 2007, 11 when using Outlook
2003, or 10 when using Outlook 2002."