How to handle "unofficial package" upgrade

["Greg Wiley" <greg@orthogony.com>]

Good day all-

On a Debian Potato, I am using KDE 2.1 packages that
are, obviously, not part of Potato but are from a fairly
common source.

Since KDE 2.2 is slated for inclusion in the upcoming
Debian release, what is the best way to prepare for the
upgrade?  I cannot assume that the new packages will
be aware of the old and will upgrade them automatically
( will they?).  So, am I best off finding every trace of
the non-Debian KDE and eradicating or will things just
sort of work out if I leave it all alone?  Any suggestions?

Thanks,

  -=greg