On Thu, Sep 06, 2001 at 01:06:04AM +1000, Chris Baird wrote:
> Given that I have the source tarballs (syssrc.tgz, src.tgz, etc) from
> the 1.5 release, how can I go about updating the source tree using
> sup/rsync/whatever to 1.5.1+ ? (With bandwidth a major concern.)

I did exactly that.  It has been a while and I am writing this from
memory so you may need to tweak a thing or two.

But essentially:

1- unpack your tarballs
2- cd into the top level src dir (/usr/src/ or wherever)
3- invoke rsync:

  rsync -prztv rsync.netbsd.org::NetBSD/NetBSD-release-1-5/src/ .

HTH.