nat -> pptp

[Joseph A Borg <jacborg_(_at_)_mac_(_dot_)_com>]

first thanks for all who helped a novice (me) get to grips with pptp. 
After re-installing the os and adding the pptp package, I had a 
relatively smooth connection.

I am presently trying to configure NAT (on 3.1). I do have a general 
idea of how nat works, but looking through the openbsd man pages and 
website, I could not fathom how to link an internal ip set to a dynamic 
ppp0 connection, any links/pointers greatly appreciated.

Somewhere I read that the system will resolve the dynamic ip address at 
ppp0 to the nat rules concerned, this means that I don't have to have 
the pptp connection up before setting the nat--right?

regards