I added a button in the contact search layout which looks like this:
Since we need to push the package into App Exchange, I need to be able to add this into the package. I searched the components and don't find anything there. I also searched the forums and documents and only found this: https://stackoverflow.com/questions/8067099/how-to-add-search-layouts-in-salesforce-package . Since this post was 2011, is there any change on this?