I'm working with custom site definitions and list definitions. I've
created a custom list based on the issue list definition. My problem
is getting a customized threaded view working properly.

I would like a threaded view of this list (based on priority, for
example). The update/comment field of an issue list always keeps
history everytime it gets changed, and I would like each of these to
be viewed in the threaded list.

For example, I want the threaded view to look like:
- Priority: High (2)
IssueName1 - Priority1 - Status1 - Comment1b
IssueName1 - Priority1 - Status1 - Comment1a
- Priority: Low (3)
IssueName2 - Priority2 - Status2 - Comment2b
IssueName2 - Priority2 - Status2 - Comment2a
IssueName3 - Priority3 - Status3 - Comment3

But I can't get each comment field to appear in the threaded view.
It will only show the most recent comment, such as:
- Priority: High (2)
IssueName1 - Priority1 - Status1 - Comment1b
- Priority: Low (3)
IssueName2 - Priority2 - Status2 - Comment2b
IssueName3 - Priority3 - Status2 - Comment3