Which router do you use?
Was just about to ask that

(not sure my Netgear supports that - got a trip to the docu's planned now, hehe)
Hiya
Sorry - not been able to do a diagram tonight as I've been trying to book train tickets (which has taken most of my evening

).
No problem ... still waiting for PN to sort out both PTR issues, and the hosts-file.net DNS to change (according to a PN rep, it's been on "Pending" since approx 4pm or so)
Basically:
My router got assigned the IP address a.b.90.21, and the IP block was a.b.90.20, 21, 22 and 23.
I told my router that any requests coming in for a.b.90.22 were to be redirected to 192.168.1.99 (the IP of the box acting as the server).
I then told my router that any requests coming in for the required ports on a.b.90.21 were to be forwareded to 192.168.1.100 which was the other server.
I did experiment, and it appeared to work, with using the other 2 addresses too, which meant that the 4 machines I was using all had their own static IP address and that seemed to work quite well as well.
I'll try and diagram it tomorrow once I get Visio working on my windows box.
cheers

(was pondering the same setup whilst I awaited your reply

)
Interesting, so basically you aren't using the ips directly on the PC. Sounds a nice idea. Might have to sort out an IP block once my migration is complete or can I order this in advance for a business connection?
Ian
AFAIK you can order it in advance (you'll be given a new IP when you order it anyway)