Window positioning

[Simon]

I've recently purchased a widescreen monitor, but I don't like having windows at full width, as much of the time, it just looks like a lot of vacant space, so I have most windows open at about 60-75% width of the Desktop.  I think I'm starting to get OCD, but when you get splash screens for programs, or program dialogue boxes, they nearly always appear dead centre of the screen, so is there any way to make all windows appear central on the screen when they open, rather than nudging off-centre screens into position all the time?