Solaris 10 Desktop resolution

I have a problem with solaris 10 desktop resolution.
My resolution is 1680x1050.
I want to boot in troubleshooting mode to change this resolution for the root user. Or all users. What is the configuration script.
ex: .dtconfig/Xconfig

on sparc or x86?

On X86 under vmware.

try using the "kdmconfig" commando...