I have a quick question - is it possible to have 2 image map nodes on the Diffuse Color in the material room - im trying to get a texture image map and also a color image map on the diffuse color

I think you should use a Blender Node. Attach the two maps to the Blender Node, adjust the blend settings, and plug the node into the Diffuse Color channel on the Root Node

LMK

I use this technique to decal images on other textures.  Blender node works very well.  Could you post an image to exactly what you hope to accomplish?

Thanks for that - I got that to work but the color looks washed out

A blender node mixes each colour component in your two maps in the ratio defined by the Blend value, but it sounds as though mixing the colours is not what you wanted.

Think about how you want the texture map data to modify the base colours in the colour map. 

Do you want darker areas in the texture map to simply reduce the intensity coming from the colour map, without affecting the hue? If so, you could try plugging in the texture map to the Diffuse_Value channel, just to see if it gives the effect you want. This is like a colour_math Multiply node, except the texture map is treated as greyscale data and does not alter the hue.

If you want colour data from the texture map to influence the final colour, then try using an external colour_math Multiply node instead, plugging the output into the Diffuse_Colour channel.

(edit) - agree with nruddock - best is if you show us the image maps.

Quote - Thanks for that - I got that to work but the color looks washed out

Post screenshots of the node setup as the problem ought to be easy to spot.

Quote -
Do you want darker areas in the texture map to simply reduce the intensity coming from the colour map, without affecting the hue? If so, you could try plugging in the texture map to the Diffuse_Value channel, just to see if it gives the effect you want. This is like a colour_math Multiply node, except the texture map is treated as greyscale data and does not alter the hue.

(edit) - agree with nruddock - best is if you show us the image maps.

Thats awesome - it worked great and exactly what I was trying to do - thanks also to everyone else for their help