plugin for admin template post

hi everyone,

sorry for my english speaking, i’m french user.
i didn’t find this in the plugin database, so i decided to post on the forum

here is the project :
i need to my users a piece of special addon admin like this :
i use a lot of postmeta
the objective is to have specials pages to edit specials posts.
because use the editpost page with a lot of postmeta is too difficult for my users

– have some templates with dedicated form with post template.
example i’ve got an special article “event” with postmeta “eve-date-begin”, “eve-date-end”, “eve-place”, “eve-short-description”, etc.

other example, special article “book” with postmeta “boo-author”, ”boo-reference”, “boo-date-published”, etc.

– have a page admin to create this template form post

– list all posts by template post use

did someone understand what i say ?

for the moment i’have develop spécific admin page in the wp-admin folders
modify several files of wp. it’s work, it’ dirty with old version of wordpress.
i would to use the last version of wordpress 2.9.2 and now my special admin page don’t work.

so i’ve mind i could use a plugin to have an addon clean to complete my objective.
I would to know is someting like this exist ?
if yes, where ?
if no, someone is interrest to develop this ?

thanks for answer.