Simple application for Rotating Screen?

I have been searching for a simple application for Rotating the screen (portrait to landscape) on my Mio 168 and Acer N35, both on WM 2003. I know that this is supposed to be included on this operating system, but there is no reference to it in the Screen Options screen. Windows Media does rotate, just by touching the little arrow in the top right. I have tried various downloaded applications (Rotate330, Rotatev11, RBC9-Landtray) - none of these work, some just lock up the PDA. Can anyone help please?

Peter.