well you could get a broad band router. most of them have ppp0e clients that make the connection instead of your computer and can be set to remake the connection if it gets dropped. this will also allow you to attach more computers

the westell 2200 is what verizon is currently issuing. this is a router that contains the winpoet client

if you still have the pppoe client on your computer see if you can get your hands on an older install disk. there is an option on the older version to connect on windows start which i havn't seen on the newer winpoet installs. i have it if you can't get it.

or you could put it in the startup folder as has already been said