How to save material preset map but not color

How can I save a material preset in DS 4.6.2.120 that saves the diffuse channel image map (JPEG file) without changing the RGB color value?
I attached a screen shot. I want my saved material preset to specify the image to be loaded into the channel (the circled part) but not the RGB color (the crossed out part). I want the RGB value of the diffuse channel to not change when I later apply my saved preset.


Capture.PNG
407 x 102 - 8K
Comments
I tried doing the same and could not find a way using the DS prests.
However, MatPoseEdit 4 will allow you to make a PZ2 file that only contains certain info, including just the diffuse map
http://www.mediafire.com/download/6u9r8cw8bp264eg/MAT_Pose_Edit_BETA4_2.zip
In case you dont know, in MPE you double click to disable or enable certain fields.
Interesting. What I'm trying to do is convert just such a pz2 material file to duf to use on Genesis 2.