Unique headers for all the posts of a certain category

My site is avelim.co.il. The site is on Hebrew wordpress 3.7.1, using the theme Weaver II Pro 2.1.1

The site has 144 active plugins.

My test site is [login to view URL]

What I need?

I need to be able to set in wordpress admin, that all posts of a certain category will have the same set header image. I need to be able to set a separate header image for posts of each category, or leave the default header image.

Till recently, I used the plugin "Twentyten Advanced Headers" to achieve this

see

[login to view URL]

For some reason the plugin stopped working.

What I tried:

1. the plugin Unique Headers allows to set a custom header image for a category page. However, it does not affect the post in the category

[login to view URL]

I am using this plugin, and want to be able to continue to do so, because I sometime need to change the header image for only the category page, without affecting the posts.

2. The plugin

[login to view URL]

According to its description it should be able to do what I need. However, I could not make it work.

Freelancer should find a solution to be able to set in wordpress admin, that all posts of a certain category will have the same set header image. I need to be able to set a separate header image for posts of each category, or leave the default header image.

The solution should be a plugin - weather configuring or amending an exiting plugin or creating a new plugin.

Freelancer will have access to test site. Freelancer shall not have access to live site. After finishing his work on test site, freelancer shall send me a plugin to install on live site.

Work should be done in 24 hours after being awarded the project.

Freelancer should allow 7 days for testing after he finishes his work, before getting paid.

Work should stand WordPress and theme upgrades

PHP WordPress

Project ID: #5114151

About the project