Redmine

Here is my environment summary:
ruby 1.8.6 (2007-03-13 patchlevel 0) [i686-linux]
Rails 2.1.0
Red Hat Enterprise Linux ES release 4 (Nahant Update 6)
mysql Ver 14.12 Distrib 5.0.51a, for redhat-linux-gnu (i686) using readline 5.0
Mongrel

ruby script/about
About your application's environment
Ruby version 1.8.6 (i686-linux)
RubyGems version 1.1.1
Rails version 2.0.2
Active Record version 2.0.2
Action Pack version 2.0.2
Active Resource version 2.0.2
Action Mailer version 2.0.2
Active Support version 2.0.2
Edge Rails revision rel_2-0-2
Application root /var/www/redmine
Environment development
Database adapter mysql

When I go to administration->Trackers and create a new tracker type, the only way I can get it to appear in the list of trackers for a project is to create a new project. I've searched around here and can't seem to find anything related to this. How can I make a new tracker type and have it be retroactively added to all existing projects?

Thanks in advance for your help and advice!