FreeBSD as a DSL modem?

[Lane]

Hello Beastie!

If I hadn't told you lately, I LOVE YOU!

Here's my question:  Is it possible to configure FreeBSD (5.3) to ACT as a DSL 
modem?

I use an Efficient Networks SpeedStream 5360, using PPoE.  But I've had to 
replace the modem more than once.  Currently everything is working nicely, 
but I'm anxious about the next failure.

What I'd like to do is setup a PC to act as router, firewall, AND dsl 
intermediary so that I can put my working DSL modem on the shelf for 
emergencies.

Any pointers are appreciated.

lane
P.S.  I built a website recently for a good paying client.  They loved the 
website, but requested that I remove the "beastie" daemon (Powered by 
FreeBSD) because they thought the image might be offensive to their christian 
clients.

I refused, of course.  

I love christians, but I just can't cotton to fools!