how to organize a conference event in drupal5?

hi all,

i want this functionality for a conference website:

users can submit papers, emails are sent to the users to confirm that their paper been received
all the submitted papers will have a link to the conference event page
conference event node shows a list of submitted paper titles
submitted papers are only viewable by the Judge role members only
judges evaluate the papers

how to implement these?

thanks,
enky