upgrading 2.1r2 to glibc2.1

[Ron Forrester <rjf@zero-ping.com>]

I have searched the archives for this, and have found (very
surprisingly) nothing -- perhaps I searched wrong?

I would like to upgrade my 2.1r2 system to glibc2.1, and dependent
packages. I would like to do so such that I maintain the consistency
of my package database. 

In otherwords, I want to upgrade only the minimum number of packages
possible, and leave my dselect (apt) pointed at the stable packages
lists from that point on.

Any suggestions?
Thanks.
rjf&