[Plugin: TDO Mini Forms] Automatically change author after post approving

HI I have a multi-author blog based on WP 3.0 and only registered users (authors) can edit existing post (with TDOMF edit form) Please how to automatically change author(after post approving in TDOMF moderation page) after new author has edited post to be set as a new author in wp site admin. I need a hack or something to do this.

Please can someone help me.