how to add region "Logo" to see it like standart wp-widget area?

I use “dynamic widget” – many widgets of my site displaying only on one category posts . I add “text”-widgets, set “region” of widget and category for them.

Also I want to use different logo for each categories . How can i change template, to see “logo” area on page wp-admin/widgets.php ?

Sorry if my questions makes you boring. But I believe that they are not completely stupid and that you will help me. 🙂