I have been connecting to Mindspring, now Earthlink, with rp-pppoe since Mandrake 7.1. Presently, during install or by calling draknet from a root prompt after install, I do the following steps:
autodetect nic
de-select the pre-selected LAN check box
select adsl
use pppoe
if it asks for domain: mindspring.com for me
DNS: 207.69.188.185, 207.69.188.186
username@mindspring.com
password
don't start connection at boot
I don't know if gamerz has the same software. You can also run the rp-pppoe setup script. Make sure it is installed, first, as root:
urpmi rp-pppoe
adsl-setup
Go with the defaults (e.g. not on-demand), fill in much the same information, and Standalone firewall is a good choice for web surfing.
There are docs in /usr/share/doc/rp-pppoe with some troubleshooting and debug info.