Well, sound card setup is not that hard. According to page 421 of the FreeBSD handbook (available as PDF), either use kld from the command line or add a line to /boot/loader.conf
for example
snd_emu10k1_load="YES"
see the file /boot/defaults/loader.conf for the listing of sound card modules.
I did this for my experimentation with FreeBSD... it was literally that easy.
Also you can look at the PPP section, but I suspect a tool like KPPP would be alot easier to work with.
[ September 05, 2004: Message edited by: M. O'Brien ]