accessing custom service produces "404 Not found: could not find resource"

Hi,

I have defined a content type with cck that includes a location field.
In order to create such a node using the services module (v6.x-2.4) with the rest_server, I am assuming that I first would need to create the location field, which has a separate id called lid and then send this along for inclusion in the node (I tried sending all the fields as an array over a http post to /services/rest/node/ , but that doesn't seem to add the location data to my nodes)

So this means, I though, that I would have to create a service for the creation of location fields that would return a valid lid.

Which I did, based on the example in http://drupal.org/node/118126.
This works fine in the service browser, but when accessing it from a remote location, it produces "404 Not found: could not find resource".

I've read in some posts and slideshows (eg. http://www.slideshare.net/hugowetterberg/services-drupalcamp-stockholm-2...) that services should/could be "resourcified".
If this is indeed what I need to do, could you tell me how to do this, or point me to a post that explains how to.

Thx !