Manufacturer images and dropdown customisation

[Actlas]

In our shop we use the manufacturers more as brands.

Can somebody please point out how code can be customised to display the manufacturer image/icon next to the manufacturer in the dropdown selection on the product category pages?
I would also like to hide this dropdown in product categories where only 1 manufacturer is available all together.

Any tips are appreciated.

[balai]

You can find that in the custom filters module
breakdesigns.net/extensions/custom-filters

It's in the free version. But it is a 3rd party module and not the drop-down you are referring.