one ADSL connection with 10 static IPs and PF

[Gholam Mostafa Faridi]

we had Leased line before and we had 27 static IPs before , but our ISP 
do not support is very well , and we change our ISP and we buy ADSL 
connection with 10 static IPs , my NAT Server is OpenBSD 5 , and I will 
change it FreeBSD 8.2 .
Can I do this with FreeBSD 8.2 and PF ? Do I have to add some options in 
Kernel or no ?
before we change our connection type from Leased line to ADSL , we have 
cisco 800 router and Leased line connect to cisco 800 and after that we 
connect it to our NAT server , every thing was good and it work like 
charm , but after change connection type , ISP give us Zyxcel ADSL modem 
with 10 startic IP , and our IPS do not say what we must do with this 
ADSL modem and these IPs.
we do not know , which mode we must use in ADSL modem , PPoE or bridge ? 
we do not know use PPoE or Bridge mode with ADSL modem and our ISP do 
not give us enough information , if I want make NAT server with PF with 
mode I must set in ADSL modem ? PPoE or bridge ?
we do not know how we must config our NAT server ,
we do not know we need ppp or no ?
we do not konw how we must config PF .
we have to use 10 static IPs and we can not use one static IP , because 
of our policy .
which options , I must add to my PF.conf