Find another episode.....

[compman55]

If memory serves me correct, in season 1 or 2, janeway and some crew beam down to an abandoned room, and during her scan detect former life. Suddenly during her scan, this life becomes a reality.

 

[picardo]

Time and again from season 1, perhaps?
http://en.wikipedia.org/wiki/Time_and_Again_(Star_Trek:_Voyager)

 

[Captain Kathryn]

This might come in handy:
http://en.wikipedia.org/wiki/List_of_Star_Trek:_Voyager_episodes

And yeah I think you are thinking of Time and Again.

 

[compman55]

Yes, that was it. Thanks.

 

[Melakon]

Compman55, have you discovered Memory Alpha yet?

http://en.memory-alpha.org/wiki/Portal:Main

It might help you track some of these down, and discover a few new things as well.