I have the most simplest, and quickest solution
Burn the episodes as a data disc.... it takes about 5 mins to burn 5 episodes using nero! Or just use your back it up to DVD option on your PC... ensure your downloaded video file is encoded with DivX/Xvid, it will be if its the same one as I got.
Get a DVD player that plays DivX -(if you don't already have one)... and hey presto, plays exactly the same as it would on your PC with lip synch intact
Although I might add that I'm only gonna use this for out of synch video files... just in case in the future you can't get DVD players with this feature 'cos there'll probably be another newer feature then to replace DivX!