For some reason, the Center() does not work.
For some reason, it puts it a little bit in the bottom right corner. (Center:() needs to be fixed)
Then I did
menu:SetPos ( ScrW()/2 - 255, ScrH()/2 -100 )
And it centers it X axis (Left to right) but for some reason, it has more space on the top of the Y axis (Up and down)