User role and login changes

Does anyone using this plugin know how to

1. Make a user role to author if they submit a campaign??

I dont want to change the default role to “author” for each registering user, because there are users that are not authors.

2. Replace login and register with wp-login / wp-register
OR Just give an if statement that when users come on the page

if logged in
they can submit a campaign
else
redirect to wp-login
and on login redirect to cause page

Please can someone help with this ??

its pretty urgent.
and it seems the author is really busy these days..

http://ww.wp.xz.cn/plugins/personal-fundraiser/