In Kiln 2.9, we'll be removing the ability to customize the links in Kiln's Resources menu. Kiln 2.9 is expected to be released in June, 2012. Custom resource links will become unavailable following the upgrade. Please back up your resource URLs if you need them.
If this feature removal will pose a problem for you or your organization, please contact Fog Creek Support and we'll look into other options for you.