Without trying to sound negative or anything - you may want to look around for a modem with an Ethernet port and which manages the PPPoE/PPPoA connection for you - this is what I use at home, and my experience has been that for the extra $100 or so, it will save you that in time and effort, nevermind frustration.
Suggested modems which do this well are DLINK DSL-300 or the Netcomm 1300.
those modems are good suggestions, but not because they do pppoe.
they support RFC 1483 bridged which the default connection type for tpg. Down with TPG!
other than that, Phil might have a TPG Home connection which does use pppoe, but it needs PAP authentication, not chap. So you need to check if its going to work, and in fact, the modem he has might be a good bet.
dave -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
