Increasing virtual memory

Hello everyone

I am having a 400 workstations in my network and I want to increased virtual memory. I am thinking two way to do it:
1. By running a script
2. By changing through the registry remotly in each Workstation.
Does anyone knows how can I do that in both of my thinking ways? Does anyone know another easy way?

I will appreciate any help

damaskk@hotmail.com