If you would like to combine 5 VOB files into one long WMV file, I would suggest using Auto Movie Creator. This video editor can import VOB files and combine them into a new movie in WMV format with only a few clicks, using a simple wizard-like interface. Regarding your second question, BUP and IFO files are only useful as part of a DVD. They are not needed to watch the video on a portable player. WMV files do not have chapters, so there is no way to use this information.