Is it possible to programmatically add a column to forumdisplay (via hooks/plugin)

[jwocky]

I wanted to add a column to the forumdisplay without actually changing the templates but rather have it added in via a plugin/hook. The data would be populated with data from a custom field in the thread table.

Is this possible? Has anyone done this with any example code? Any direction on which hook location and what variables I should tackle?

Thanks!!