PPPoE and static IP block

[Joe S]

I have new static IP ADSL service from SBC. SBC assigns a /29 netblock 
once authenticated via PPPoE. The ISP routes all traffic for the IP 
block down the same PPP session, and the last usable IP is the gateway. 
I plan to assign the static IPs to some of my servers.

I'm not sure how to setup the routing on my OpenBSD 3.8 firewall. Has 
anyone run into this? I don't want to do any 1 to 1 NAT.

Thanks.