Just curious, how do you get to those?

I had to re-configure a customer's Mac so that it used DHCP rather than PPOE (had to do with a DSL connection), but I can't remember how I got to those settings...

Any help would be appreciated....

Mac OS X or older?

In X, go to Apple Menu>System Prefs. Click on teh NETWORK icon. Find which one you want to configure (ethernet or airport), click configure, go through the settings there to adjust DHCP.

Perfect! Much thanks!

No problem.