I know that this is an old thread, just thought that perhaps there still needed to be some light shed. First things first, anytime that you use any sort of mod that changes the main.scm file you cannot use an old save game. Secondly, the boat thing is actually the acceleration modifier in the handling.cfg file, if you put it back to normal the boat will be fine. The thing to remember about modding the handling.cfg file is always have a backup of your original and a backup of your last known working cfg file, this way you have a reference to look at. About modifying the boats, bikes, planes, and helicopters; there is another section of modifiers down at the bottom of the handling.cfg file that controls a lot of the other attributes that are normally associated with these sorts of vehicles (thrust, yaw, planing of the boats, etc.) keep this in mind when trying to tweak out that last little bit. One last thing about FlashFXP, it doesn't like to automatically refresh the site that you are on. If you just use the "reconnect: X" button on the quick connect menu it will just connect to the last site and not refresh the listing. Hope that clears up some confusion.
Doob