Those instructions are quite old.thanks for your posting below, however your link 5) for people with a desktop modem, type 'ifconfig eth0 192.168.0.10 netmask 255.255.255.0 up' (and follow further instructions "here") is inoperable. please help as i have a desktop modem and your detailed instructions seem to be the best i've come across
Which distribution are you running and which modem do you have?
These days, if you have an iBurst modem connected by Ethernet you should be able to configure a static IP address and a PPPoE connection in NetworkManager without having to touch the terminal.