Wordpress Plugin - Insert Additional Content On Post

You must be a wordpress expert and understand the ins and outs of wordpress to do this job. The main function of the plugin is to be able to insert additional content after/before/etc posts. There are some plugins that exists like this where you can insert additional content after each posts. What I want though is an extension of that kind of plugin but with more features like controlling where to show/hide the content. Basically you have the plugin panel where one enters the content in a box. a. The the user can then specify which posts/pages, or which categories or tags to show the content. b. The user can also choose which posts, pages, categories or tags will ignore the content. c. Also, there is an option to add content into the home page, archives and category/tags pages. d. The content to be inserted will also have positioning/placement - where to insert the content either above the post, below it, left right, as well as insert the content in the header or footer, or initialization. The content box must be able to accept html, php and shortcodes. The user interface of this plugin must use the non-refreshing method of saving, adding, and updating entries like some plugins use. Meaning, you must have knowledge with ajax, jquery or such. Page shouldn't need to be refresh everytime an update is made or added. The user interface should not be "clunky" or scattered looking. Please use ajax or jquery or some script and use a minimize/expand effect. Here is a mock draft of how the interface will look like to give you a better overview. Any improvements to make it cleaner and nicer to look at is welcomed. Default Page: [login to view URL] - User Interface [login to view URL] With Entries: [login to view URL] - User Interface With Sample [login to view URL] The draft is just a draft layout and is not final. For example, links/buttons can be turned into icons to make the plugin page look pleasing. I should have rights of the final product and author name should be under a brand or name I choose. I am a person who is impressed by great user interface design. Thanks.