Change interactive flag on service from command line

Hello,

I've been struggling with this issue and can't seem to find a solution
thus far.

Basically I need to figure out a way through the command line to change
the option in a service to allow it to interact with the desktop. This
is a simple checkmark in the service control panel applet. I've tried
using sc.exe which is the only command line tool I know of, and none of
the options seem to provide this function.

This is for an installation script of a service/app that I need to
deploy across many computers.

Any other ideas?

Thanks,
Max