No, i think its a irix version of maya! But anyway changing widows darker is rather easy (the window color is what controlls the clolor of your markupmenu):
Rightclick on your empty desktop select properties, and choose appearences tab.
set windows and buttons to windows classic, click advanced. choose 3d objects and set the color to darker, maya will follow.
I fdont recomend using the xxp default or skinned looks with maya as this causes problems in maya usage such a splayblast problems...