First, locate your Maya shortcut, then right-click on it and chose "Properties". In tab "Shortcut" there is a text field named "Target", click on it.
Just add this command: -style cleanlooks
That is just an example, you can choose a diffrent style if you want. Here are just a few of them I found: plastique, cde, motif, windows, monolith... (don't forget to add "-style" before choosing a theme.)
And just to say that monolith theme is the closest to an old look of Maya, for all nostalgic :D
Hope this tip will be helpful for some of you. Bye!
