Actually I wasn't that clear in my first post .... :oops:
The problem affects only DivX files that are stored in my hybrid and that I'm playing with Xine plugin.
In this situation I cannot adjust screen size, because Xine plugin does not handle any of genuine xine commands apart of general ones (volume, start-stop-pause, rewind-forward).
If I play the same video launching Xine with a script in computing section (i.e. not using Xine Plugin) I have a kind of a remote control that allow me to do whatever I want, including pressing "a" key until I get anamorfic mode.
For some videos (really 4:3) the result is a distorted/stretched image that is not pleasant to view, but I have a lot of videos that are looking great in anamorfic mode.
So basically it would be a matter to be able to control this parameters from Xine plugin (i.e. from Orbiters)
This concept would also apply to other xine commands (switch subtitles on/off, change language on the fly, display lenght-duration-time of playing movie/video)
Has anyone else this kind of problem, and if so is there an easy solution?