Redirect outside traffic on a specific internal address on pix506

I have a pix506, version 6.3(3) I have a /30 class for my public addresses. One ip is taken by the router and one by the firewall outside address. All inside clients connect to the internet via PAT on the FW interface

I would like to redirect all incoming traffic to the pix outside address on a specific port (say http for example) to one specific server on the inside. This is due to the lack of IP addresses in order to establish a NAT, so my only option is to use the FW IP. Is it possible to do this? Can I do this via PDM?

Thanks Dave