Hi Deca,
Unfortunately, OS9 doesn't have <a href="http://docs.info.apple.com/article.html?artnum=106868" target="_blank">native support for PPPoE</a> (unless you have an airport basestation or other broadband router, which supports PPPoE), you'll need third party software. I believe the verizon DSL software uses MacPoET (which use to be buggy, but might be improved since I last used it).
good luck!
dave