I make a usefull plugin is like a scaffold but it create an entirely
backend for yours admin apps.
The layout of page, grids, and other things are build on EXT JS
framework with prototype adapter so u don't change any thing in yours
You can find docs and images here: http://rails.lipsiasoft.com/wiki/lipsiadmin/Wiki
You can try a live admin here: http://demoadmin.lipsiasoft.org/admin
You can download the sample apps here: http://rails.lipsiasoft.com/versions/download/2?attachment_id=2
And yes you can install simply through
$ script/plugin install http//svn.lipsiasoft.com/lipsiadmin
Remeber to help me to improve this admin submitting bugs and fatures
Thanks so much any feedback will be very apreciated!