brightness/contrast shemes

with the detonator you can make brightness/contrast/??? shemes<br>
so i wanted to know:<br>
<br>
how to change them from console/batch?<br>
<br>
this would save me a lot of work cause i wouldn't have to go throu 3 menues and back every time i beginn/end gaming/work and wait for each menu to open<br>
with two batches (placed on desktop or so) , it were much easyer and more comfortable<br>
thx for your help