Hello guys!! =)
I found here - http://www.topshareware.com/VidCrop-PRO-download-56330.htm a very good tool, vidcrop pro.
it's a complete video cropper, supports AVI, WMV, MOV, MPEG, MPEG1, MPEG2, 3gp, mp4... very helpful, I think, isn't it?:tup: