Link to an image when i invisible the Category?

[glitzer]

Hi
i want only to link to a image  for sending postcard in my 4 image script, but i donīt want to show the whole categorie where the image is.

Is this possible?

I Tried:
In my Admin i click in the category "show the categorie" - Administration or Privat and "Show details of image" - Admin, Privat or All, and "Send as a postcard" = All
but when i am a Guest and click the link..it redirected to the start site without to see the linked image.

Has anybody any Idea?

greets,
glitzer