<img src="http://www.piratesahoy.com/forum/style_emoticons/<#EMO_DIR#>/hi.gif" style="vertical-align:middle" emoid=":gday" border="0" alt="hi.gif" /> there, mateys.
It's been some time since I played the unmodded POTC but from memory here's how I attacked the Greenford fort. Patience is required.
Firstly one battleship is all you need, stocked up with plenty of balls. I used balls over bombs for the range advantage. Also make sure your ship is equipped with cannons that have the greatest range quality(24lb culverines from memory?). <i>I can't remember whether the repair skills worked in the stock POTC but in Build 12 I would also load up with plenty of planks (and sail cloth just in case), and make sure I had both the repair skills.</i>
Manually sail out to sea from the lighthouse and curve around until your sailing directly towards the fort from seaward. As you near the two little island/rocks to left and right, reduce your speed down to a minimum and start firing ranging shots from your bow chasers to guage how far in you need to go to start hitting the fort. Somewhere around the line of the inner edges of the rocks and the inner channels you should be within range of the outermost tower of the fort and also be able to hit it. At this point you should have reduced all sail and can turn broadside on and knock out the tower and nearby walls with your broadsides. If you determine the right spot to turn and fire, you should have a definite firepower advantage, as only the two guns on the tower can hit you whilst you should be able to hit both them and a number of guns on the wall. It's extreme range and it tests your accuracy skills but it works. After knocking out those guns that are within range, turn towards the fort, sail in a little closer turn broadside on again and do the same. Repeat until you eventually knock the fort out. By doing it this way, reducing the fort tower by tower, you minimise your exposure to the forts full firepower which is pretty formidable and more than capable of sinking a number of battleships with poor gunnery skills. <img src="http://www.piratesahoy.com/forum/style_emoticons/<#EMO_DIR#>/boom.gif" style="vertical-align:middle" emoid=":boom" border="0" alt="boom.gif" />
Hope this helps.
Cheers <img src="http://www.piratesahoy.com/forum/style_emoticons/<#EMO_DIR#>/par-ty.gif" style="vertical-align:middle" emoid="
" border="0" alt="par-ty.gif" />
p.s. Ignore what your spyglass tells you about the integrity of the fort itself. What you should be looking for is messages saying "cannon destroyed" (something like that) and you should start to see smoke rising from locations along the walls and towers where each cannon has been destroyed. If there's alot of smoke sources then you're well on your way to knocking out the fort.