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Adding an additional Public IP Block on my Cisco 2801 Router

I have a Cisco 2801 Router that connects me to the ISP. This Router also does NAT/PAT, Firewall, VPN, etc.

As you can see below by looking at my interface configurations, I only have a /30 block of IP addresses. We are getting an application on one of our servers that require a static NAT. Since I don't have any IP addresses, my ISP just assigned me an additional block of IP's which is a /29 block. So I have my WAN connection, which is a /30 block, and I have my public rout-able IP block which is a /29 block. How do I configure my router for this additional IP Block? Behind my 2801 router its a cisco 2950 switch. The router is connected to the switch via interface FastEthernet0/0. Should I add a secondary IP from the /29 block to interface FastEthernet0/3/0.1? See interface configurations below: Any assistance would be greatly appreciated.

interface FastEthernet0/3/0
no ip address
duplex auto
speed auto
!
interface FastEthernet0/3/0.1
description WAN_ISP
encapsulation dot1Q 10
ip address x.x.205.6 255.255.255.252
ip nat outside
no cdp enable
!
interface FastEthernet0/0
description TO CISCO 2950 SWITCH LAN
ip address 172.17.0.1 255.255.0.0
ip nat inside
ip virtual-reassembly
speed auto
full-duplex
no cdp enable

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mat1458

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denver218

ASKER

Thanks. I only had to add one IP Address in the block as a secondary. For the network devices that required a Static NAT, I just entered the Static NAT and all worked fine. Thanks.