Are you saying that you want a separate search link to appear in the left sidebar on the search page?

If so, you need to look up the docs on registering your object type.

I believe I have done this.  I create my cities using $city = new ElggObject(); and give it a sub-type of "city".  I list them using list_entities.  I just can't seem to find them in a search.

I will look some more at other plugins that add Object types and see if I can figure it out.  I guess I thought it would be easier since the blog tutorial indicated if I fill in "tags" on my ElggObject that search was automatic.

Thx for the hint Kevin!

I needed to make a call to register_entity_type() to make my object appear in the search types.

I appreciate the help.