Posto SegretoI've made my own castaway island with plenty of beach frontage. I love the beach lots in Bon Voyage. The vast majority of the coastline will allow beach lots to be placed.
Although this isn't quite an island, it's more a forgotten peninsula, there's an old untravelled stone road that leads over the hills and far away. Hee, I was going to call this hood, 'Lost Peninsula' but when I saw how that translated into Italian, I decided I'd better not.
I was quite taken with the sims castaway stories and incredibly frustrated by the general lack of playability once the story was over, so here is Posto Segreto - do an Italian translation if you want to know what that name means!
This neighbourhood has no trees, I know many people have problems with trees and as there are so many hood decorations now, I thought I'd just leave trees out altogether. My game has a funny habit of giving me hot-pink and flame-red trees anyway.
This literally took hours upon hours to make. If the coastline was too straight, the whole thing looked too blocky and 2D, if I smoothed the edges too much or too little, sims 2 refused to place lots. At first I couldn't even get roads to show up, well the intersections and bridges, anyway. Then I remembered I'd modded simcity 4 with a network addon, once I removed that, my bridges and intersections worked. What a mission.
Anyway, done now, enjoy.

What the terrain looks like in Simcity 4

Sims 2 lush

Sims 2 dirt

Sims 2 desert

Sims 2 concrete

Unrar the files and place them all in C:\Documents and Settings\yourname\My Documents\EA Games\The Sims 2\SC4Terrains