lucatrader wrote on Jan 2^nd, 2012 at 2:12am:

Sorry, but their instructions are a mess

How about those? http://www.captainsim.org/yabb2/YaBB.pl?num=1286031420
It's a link from this thread, which sums up all common mods and tweaks on the 727. http://www.captainsim.org/yabb2/YaBB.pl?num=1319547655

But I have to warn you. The installation of the thing is the easier part of the game, understanding the operation takes way more effort and you will have to read some more to get into it.  :-/
As you may have guessed, there already is a thread which collects all INS operation topics and questions. So keep that one in mind when looking for answers.  ;) http://www.captainsim.org/yabb2/YaBB.pl?num=1285100008