108336 Adsense insert into WordPress

Repost of closed project. I need a plugin similar to Adsense Injector ( [login to view URL] ) with some additional functionality. Specifically: 1)To place an ad unit ABOVE a post title. While still being able to inject other ad units as normal. 2)To place an ad, of specified size, at the top left hand corner of a post, while still being able to inject other ad units as normal. 3)To automatically restrict the ad units used when a post is very short (5 lines or less) so that we don't have ads that are bigger than the post. 4)When I was referring to Adsense appearing at top left corner or above the title, I would like for this action to happen for the FIRST post on each page, or ALL posts. If the first post is selected the the other postions may be randomised, or ALL posts. I hope I explained that OK! Also, I want to have basic password functionality such that it will only work on specific sites. I am thinking of using basic code obfuscation to hide a key, possibly the site URL, such that if the plugin is installed on another site it will not work. I don't want this plugin to be found all over the internet!