[Fingers]

The thing about the page numbers is that they don't actually affect anything. You could just write the "PAGE" line without a number... When you use something like "GOTO 3" it'll just go to the fourth page defined in the file. The numbers are just there to help *you* remember which one is #3, assuming you keep them in order.

You can not add difficulty levels, there's only five (0-4). The map size difficulty modifier must be between 0 and 2. It is added to the number of enemies setting (also from 0 to 2) and the sum is used to pick the difficulty level.

The structural bug as well as being unable to remove passengers (and many other bugs) have been fixed in WW 1.2. The Win32 version is out, hopefully the OSX will be done soon.

The IPAY number is only used in the final score calculations in the end of the game, and it's a simple subtraction. Your crash must've been caused by something else.