In my opinion, Bones4's Titanic is THE way to go if you want a Blockland Titanic
That and Ship Simulator is better than Virtual Sailor and that by all means you should avoid using the 1997 film Titanic as a source of any kind of information remotely related to the RMS Titanic.
Also, Titanic had 20 lifeboats, not 18.
Contact me and I will be happy to act as a consultant for you guys.