Terragen

I read the tutorial about terragen and it didnt help me. When it says to add a texture I dont know how to get the texture right. I know how to change it to BMP but it says its not a square, or not 24-bit. I also wanted to know how to make an environment that is only ocean with no mountains.

I can only help you with the texture part. Go to paint to edit your texture. Move the corsor to the lower right hand of the picture. It should become two diagonal arrows. The click and hold and drag your mouse. Look to the bottom right hand corner of you screen. There should be something like this: 394 x 276. Drag (still holding) your mouse until both numbers are the same. Then save your square texture as a "24-bit Bitmap". It's definately on the drop-down list.