Redmine

Hey guys,

I have the mission to link a request issue to the project the request is related to.
For doing this I'm looking for a way to add a custom field to a tracker that allows me to select a project from a list of subprojects.
I've achieved something similar with a plain text field, but a fixed list would be better as it protects against input errors caused by the user.

Is there already a plugin for that purpose or does somebody know one that I can modify to my needs?

Thanks in advance,

Bernhard