Hi Mark
The 3 files required to allow your host to work as specified are the follows
/etc/resolv.conf
/etc/nsswitch.conf
/etc/defaultrouter
resolv and conf you create yourself.
/etc/resolv.conf add one line adding the dns
The syntax is (xxx being the ip address of the dns)-:
nameserver xxx.xxx.xxx.xxx
/etc/nsswitch.conf, in this file go to where it says hosts.
Append after files and add the word dns
/etc/defaultrouter, here just insert the defaultrouter address you are using.
In regards to adding users, just run admintool. It should be pretty intuitive.
If you would prefer to use CLI then man useradd and it will help
Jono