How to setup one IP as bridged mixed with multiple NAT IP's

[rollingrocker]

Here is what I have:

xx.xx.111.2 –> xx.xx.111.30 (available public IP's)
my PFSENSE box is at 111.2
Data Center's IP: 111.1

I have the IP's 3 ->30 set as 1:1 NAT  (public IP on one side of the PFSENSE box, and private IP on the inside).  This is working fine, and I have all ports from each IP port mapped through through firewall rules.

**What I NEED to do (based on a very particular client need):

I want to pass through the IP address xx.xx.111.30 to a server with it's own firewalling setup.**

I currently have 4 NIC's on the PFSENSE box and am running the most current PFSENSE version 2.4.2
NIC 1: WAN
NIC 2: LAN (where all the NAT servers connect through)
NIC 3: OPT (want to use this for the above scenario)
NIC 4: OPT (not used)

_**In plain text, I want to directly pass all traffic to the server, which will be BY ITSELF on my rack and that server will have a public IP address.

WAN side (xx.xx.111.30) -> through OPT interface to server with public IP xx.xx.111.30 in it's static IP setup.  That server MUST have the IP address as a PUBLIC IP.**_
I am trying to avoid asking the data center to split out that one IP address into it's own block as I will get charged for that.

I believe that I need to setup a bridge but I don't know the exact settings to use, and I don't want to mess up my existing config.

I don't want to touch the other IP's 111.2 through 111.29.

There is already a NAT map for 111.30 that I am sure will need to be removed, and a virtual IP that will probably need removing too, but I just don't know the proper way to config the bridge.

Any advice would be appreciated.

Thanks!