.mts (mpeg2 TS + AC3, 1920x1080) video by Panasonic camcorder HDC-SD9EP
.mov (Apple mpeg4 + PCM, 1280x720 and 640x480) video by Panasonic camera DMC-TZ5
.mov (H264 + PCM, 1920x1080) video by Casio Exifilm F1

The info about the files are from KM Player (last stable ver. 1428) in which the videos are playable.
For ceaseless playing of H264-full HD videos I have installed the DivX H264 B2 decoder and disabled H264 support in FFDShow and the internal one in KMPlayer.

I am not fun of using KM Player 1428 version on Vista because it sometimes output problem with Vista (compatibility) and newer versions of KMPlayer are still unstable, sometime outputing another problems. KM Player 1428 works perfectly only on XP in the meantime :-(

OS and HW info: Vista Home Premium, Vista codeck package (last ver.), Mobile Core2Duo, 4GB RAM, 320GB HDD (Anough power for full HD video on Nonetbook I think)

Thank you very much for all your possible helps and advices.