Organizing directory with custompress

Alright so I keep going in circles trying to get this site to be user friendly.

I would like to create a simple directory that is simple to navigate like craigslist.

When a user is looking for a listing they first get to a location page like craigslist.org

Then they will go in to categories

I can not figure out how to filter listings by custom fields as I have country state county city zip as custom fields.

The short and embed codes don't seem to do this for me. How can I output a link that will filter results based on if a user selected a county/area like craigslist does? I need it to be the county selected by the user.

Thank you