Edit WordPress Plugin: Subordinate Post Type Helpers

I am developing a site using Subordinate Post Type Helpers [login to view URL] Currently, the editing of the subpages appears in a thickbox. The contents of that lightbox are created in children.php. I would like to have the lightbox to additionally display : - any Advance Custom Fields for that post type - any custom taxonomy box for that post type - the Status dropdown from the "Publish" box - Featured Image As an alternate method from the original I have attempted to code the thickbox to use [login to view URL] instead of admin-post.php. I have this partially coded and am hiding the elements that I don't want in the thickbox - the admin navigation, view options, and add new link. This alternate method will require that the parent_id is saved properly. Either solution, or any alternate would be acceptable. I just need to be able to click to add or edit the custom sub post type in a thickbox. I don't know if it is possible, but I would also like to have the URL rewrite set up so that the subpage shows as a child of the parent. Currently the url structure of the subpage is /child-post-type/child-post-slug/ and I would like it to be /parent-post-type/parent-post-slug/child-post-slug I have attached the version of the subpost plugin that I am working with that defines my parent and child post types, as well as a simple XML with the posts as well as the Advanced Custom Fields settings.