Can the render Poser is rendering at any one time be viewed remotely, say by a PC on the same network?  You might have noticed that when re-launching Poser, it displays the last render from the previous session, so it must be stored somewhere; I wonder if it's stored as it renders, or does it only save it when you quit the programme/stop the render? 

Just wondering; if Poser were to store a render on the fly, it would mean that using the laptop (downstairs) I could keep an eye on the render on the PC (upstairs) while watching TV and drinking beer!

Poser does store the last 10 renders in a folder called PoserRenderCache
under Documents and Settings, but these probably won't help to do what you want.
These are in a format that I haven't been able to read; maybe proprietary or compressed.

(P6 stored them in BMP form without the header, which could be viewed easily
in Photoshop or Irfan if you knew the render dimensions.)

search for and download oneclickvnc  compile the exe on your laptop, then run that exe on the poser machine.

or just use any version of VNC.  Or even programsaccessoriesremote desktop connection and type in the local IP of the poser machine.

on a LAN, these work awesome. you can even actively use poser with this software from your laptop.  I actually use pocketVNC to keep an eye on Poser on my pocket PC while its rendering