Tip for when creating CPT File with Terrain Tool.
 

Thought I would add this time saving TIP:

If when your Genarating your .CPT file from the .RAW file if in any part of the first stage of Triangulation and LOD you hit 99% stop creating your CPT as it means that there are glitches with your depthmap(Raw File).

So just load up your RAW file in PSP Or PS and take a closer look and use the offset Filter set to 512/512, You can see if there are any probs with the way it tile's.

Hope you understand this, im not to good at explaing things....;)