woody->potato, woody->slink, potato->slink?

[John Anthony Kazos Jr.]

Out of sheerest curiosity, since I'm not having any problems with woody beyond
the X/gpm mouse grabbing and X->fb corruption, is there a way to downgrade from
woody to potato, from woody to slink, and from potato to slink? I would assume a
forced apt-get dist-upgrade with appropriate lines in sources.list would do the
trick, but I've no desire to install and upgrade just to test.