I've started to do one. My wife thought it was something we could do together... She drilled out two portholes and said "I'm done!!" Needless to say, Titanic is still progress.
As for the method I used, I came across a website (http://www.geocities.com/TimesSquare/Portal/5262/start.htm)
and followed the same process the author used. The method requires 2 incandescent light bulbs and fiber optics. The result is pretty impressive. Maybe someday, between work, school, and al my other projects in progress, I'll get it done.
Hope this helps.