There is an adobe pdf file with instructions, but that is in Russian. Within this directory is a video tutorial that I am unable to play (tried on the winXP laptop and on a Windows7 lappie, with mplayer as well as windows media player).
The item was described as 'Lexia-3 Lexia3 V48 PP2000 V25 with Diagbox V7.57 Software' I have checked the supplied DVD and it has a single directory called diagbox7.01-7.61. Unfortunately, as I ordered from a cheap ebay seller in China, the documentation is not as good as it might be (and some of it not in English). I just got back from a holiday and found my lexia-3 cable set and software arrived while I was away.