How to Disable write behind cache

I am a system administrator that was just informed by our QA department that we need to Disable Write Behind Cache on over 400 9X clients that are stand-alone units. By stand-alone I mean it has no monitor, keyboard, just a 3 line LCD and thtats about it. I was wondering if it was possible to disable it by editing the registry or using a SET command?

Anything that you can think is better than I have got now other than dragging around a monitor and keyboard to all the machines and doing it all manually.