Solaris is not is easy to maintain, that from what I experienced up till now +__+. For example if you want to change the name of our computer you have to go through all this stuff, while in Windows you can do it easily 
, but this is the interesting part, you have to try it!!
Change the name in /etc/nodename
Inside here just replace the old name with the name that you wanted
Change the name in /etc/hostname.interface
Inside here just replace the old name with the name that you wanted
Change the name in /etc/hosts
127.0.0.1 localhost
10.0.0.1 new_hostname loghost
After this you can type
hostname new_hostname
After that you can try to reboot and check by ping to your new hostname.
