I find netbooting the simplest way to install, and I find
NetBSD-1.4.1/sparc/installation/netboot/install.sh
close to ideal for the purpose.

However it assumes that the directory it is in is in $PATH
and should really do the moral equivalent of

PATH=$PATH:`dirname $0`

before doing 

. install.md

Also, I think it could reasonably do:

mysets=`dirname $0`/../../binary/sets

so that install_sets() could do something like:

[ -d ${mysets:-/dev/null} ] && local_sets_dir=$mysets

to save the user having to key it in.


--sjg