This question already has an answer here:
In this wikipedia entry it claims the following:
A few references to Star Wars have been inserted into Star Trek films; for fleeting moments one can see ships and droids from Star Wars. Most Star Trek films and some TV episodes used Industrial Light and Magic, founded to provide effects for Star Wars, for their special effects.
Is there a listing or does anybody know of the specific Star Trek episodes and/or movies where these Star Wars ships/droids are inserted?
If you can supply not only the episode/movie names, but also the point in the episode/movie, a screenshot, or time stamp that would be helpful.