You post them here (in this thread) as soon as their done. How long depends on you and how much time you want to put into them. I've been doing mine for the last week but it still needs a bit of work, i was a bit busy this past weekend or i would have done it then.
As long as it gets done (eventually) there's no problem http://www.totalwar.org/forum/non-cg...-2thumbsup.gif