lcd problem

hi, i have a 5" ps1 lcd and i am using it as a secondary monitor. thing is its cloning the primary display on it, i dont want this to happen, i just want it 2 display things i drag onto it. how do i do this? also i cannot change its res. powerstrip isnt letting me select it.
Thanks

its kl now, i fixed it. i reinstalled the drivers and it now works fine.

what resolution does it display at?!
Nice use of older tech.