Well you want custom windows(to put full char pict, and whatever info you want), which the message script allows you to do, and Hime's script allows you to make custom menu commands.
In short due to the way the default RM scripts handle char's menus(aka it checks the date to determine the face pic, however the database doesn't assign busts/full bods pics to char, hell the RTP doesn't come with any pics at all be default), and there page, It's easier just to write out a new script to override how menus work, then to try and add it to the default script.
For things like status pages, you can use the message script to create them(in a common event), then you use Hime's script(disable the default Status command, which is easy to do), create your custom command, and tie the common event that houses your custom status pages to the new command you made.
That's really the easiest way to go about changing such things, and you can personally customize everything the way you want it to be.