No installation Howto, as both Debian/Sparc and Solaris installations are quite simple. Just follow the instructions.
Your Sun can't remember host-id, date, mac-address? Thats mostly a broken nvram - the integrated battery has reached the end of its life. You can either buy a new one, or fix it yourself [img].
Need more free software under Solaris? Want to create Solaris packages of (your) software? See the "Links" below.

joe 3.1 (joe's own editor - installs to /usr/local)
updatedd 2.6 (dynamic dns updater - installs to /usr/local)
updatedd 2.4 (dynamic dns updater - installs to /opt/updatedd)
updatedd 2.3 (dynamic dns updater - installs to /opt/updatedd)

updatedd 2.6 for etch
updatedd 2.5 for woody/sarge
updatedd 2.4 for woody/sarge
updatedd 2.3 for woody/sarge

specs
pics

specs
pics
phpsysinfo screenshot

specs
sparcstation2 open [img]

specs
pics

sun handbooks
Debian/Sparc
Debian on a Sun Fire V100
Gentoo on a Sun Fire V100 (as a Router/Firewall)
Using Serial Consoles
Cables&Pins
Solaris + OpenSSH
OpenBoot
pkg-get
creating solaris packages
sunfreeware / gnu tools (solaris)