It's in a .zip file So, you need to un zip it. Is that what you're having troubles with, or You could be trying to download the wrong stuff. He's got links farther up the page that go to sims 2 terrain paints he based these on. Go to the bottom of the page and click on those links.
If you need free unzipping software go herehttp://builders.forumotion.net/resource-listings-f123/7-zip-winrar-file-archivers-t1001.htm
Quick Question: I really hope this isn't one of those 'always asked' questions... but I recently downloaded the textures into the 'SourceTextures' file and they work perfectly fine in CaW ... but when I go into 'Edit in Game' Mode.. it doesn't look quite as nice. Haha, For instance, I have two textures sort of overlapping in one area and in 'Edit in Game' only one texture is showing while the other has turned into this ugly pale brown... wasn't sure if I was doing something wrong? Should I not over lap textures? Really hate to be a pest. Thanks!!
... it seems EA's tool is more advanced than ours, because the water seems to be on two different levels