No software required for this setup and really no special configuration. I'll make two assumptions.
1. You have an Airport card
2. You have a Airport Base station or similar
Without #2 there is no way to set up the DSL link unless you go via ethernet cable (CAT 5) which kinda defeats the object.
So, if #1 and #2 are in your possession, do the following. Connect the DSL modem to the phone line. Connect the DSL modem to the Base Station Ethernet connection. (Make sure that Verizon provide you with a modem that has an RJ45 connection on it. You do NOT want a modem that only does USB.)
Fire up the modem and wait until it is running correctly and all the lights that should be lit, are.
Reset the Base station so that it picks up an IP address from the Modem. (this is automatic) Connect as normal to your base station. You should hit the internet with no problem. One snag that you might come across is if Verizon uses PPPoE and not TCP/IP to connect to their service. In that case you will need a piece of software that they should provide.
If you want to go the wired route, just plug the Cat5 cable into your Mac, (all Macs come with 10/100 Ethernet as standard and do not need a PCI card to supply it) and the modem and the rest should happen as if by magic. Hope this helps
I'm looking for info on software that will configure the Mac Airport for wireless dsl - I live in Philadelphia - Verizon provides wireless broadband internet service within the city using a pci card on pc platforms however they provide no info for Mac compatibility - I've heard there is configuration software available - any insights? I have no access to either cable or dsl broadband