Thanks JDFan Now That looks about right. The texture I first seen had heavy black lines. This would make the normal and spec look bad with the heavy black lines in the color map and you will never have the right look. The color map should never have black lines if you can help it. In life things don't have black outlines.
The texture I posted was only a small part. What I really want to acheive is the background - the mix of yellow, green and red - as I think that the rest would be quite easy in comparison.
The problem is, I've exhausted the methods that I can think of to create that effect. I'm primarily a modeller, so I'm a bit limited when it comes to textures, especially for a game like Oblivion where the emphasis is on realism, though I understand that having a good texture is far more important than having a good model.
So, if anyone could suggest anything, I'd be grateful.