Blog module customization

We are building a social network using Elgg. We would like to have a few customizations that would allow for the following additional functionalities: [login to view URL] entry: Elgg has a blog mod already. However, instead of having a general comment area, we want the contents of the blog entry to be displayed again but with the blog entry broken apart into separate sentences. Each of these sentences then can be commented on or corrected individually. (see attached screenshots) [login to view URL] entry submission: After the user submits a blog entry, we want the user to be presented with a lightbox or something similar that presents to the user an option to select some selected friends to review the submission. (see attached screenshots) This is just phase one of the project. Several other customizations will be needed so we require that the selected provider comment all of the PHP code. The selected provider will also be given the first opportunity to work on our other phases.