how to reinstall a package without removing it first?

[Try KDE <trykde@rogers.com>]

I cannot remove the package because the package in question is "apt" and 
I screwed up on of its example files. :)   I might be able to down its 
deb file and extract the files I needed from it. But is there a simpler 
way to force re-installation of the same version?

Thanks,
-tk