Redmine

Hello,
I hope this is the right place for my issue.

I recently installed a redmine installation with the contacts_light Plugin.
Is there a way to add a filter in the issue overview for contacts as well as an additional field in the overview where the contacts for one issue are listed?
Like a custom field that references another database table?

I would also use a solution that involves manual changes to the files since i got rudimentary experience with ruby.

About your application's environment
Ruby version 1.8.7 (i386-mingw32)
RubyGems version 1.3.7
Rack version 1.1
Rails version 2.3.11
Active Record version 2.3.11
Active Resource version 2.3.11
Action Mailer version 2.3.11
Active Support version 2.3.11
Application root d:/Webserver/Redmine
Environment development
Database adapter mysql
Database schema version 20110511000000

About your Redmine plugins
Contacts plugin 2.2-light