I'm upgrading some old hardware running NetBSD 1.5.3/Sparc to an Ultra. 
I was wondering if the following steps would enable me to bring the
system up with a minimum of effort:

(1)  Net-boot Ultra
(2)  Dump sparc filesystem & restore it on Ultra
(3)  Install boot blocks on Ultra
(4)  Install sparc64 kernel on Ultra
(5)  Reboot Ultra

I could optionally add a step 4a and extra the NetBSD 1.5.3 tarballs for
the Sparc64 architecture onto the new filesystem with very little extra
effort.

I'm trying to avoid rebuilding all the pkgsrc packages I've installed
along with countless customized config files in /etc and /usr/pkg/*. 
Last time I did this I missed a couple of things and spent quite a few
hours tracking down the problems (not to mention rebuilding hundreds of
pkgsrc packages).

Regards,

- Bill Dorsey