imaging workstation goes into suspend

Hello: We have a bunch of old P3-based workstations. These
workstations take about 15 minutes to image a 1.2 GB image file, I
believe due to the HDs being relatively slow. We run ZfD7 on OES/NW
2sp2 servers. We use pxe for imaging.

The problem is that if you do not sit at the workstation and move the
mouse during imaging, it will go into suspend mode. Must then press a
key to continue. These old workstations are headless, so to image I
have to cart around a monitor, keyboard and mouse. Pretty much sucks.

So, does this sound familiar to anyone?? Any suggestions??

Thanks, Chris.