>>342
It's pretty simple after you've done it a couple of times, just like building the Linux kernel as a beginner.

For starters, remember that the IP you'd configure in /etc/network/interfaces is your LAN IP, i.e. 192.168.0.2, not your WAN IP.

Assuming your router is 192.168.0.1, we could use 192.168.0.66 as our LAN IP. For this, we'd use "address 192.168.0.66". The "ghetto" method of getting the other values would be to connect via DHCP, run ifconfig, writing down the values, and transferring them into the interfaces file.

Simply add them in, change the address (if necessary), and, voila.

A quick example:

allow-hotplug eth0
iface eth0 inet static
address 192.168.0.1
# The other values go here...

Sorry if this guide is shit, not able to access a *nix system right now.