Color Index Waves

Hi all,

I have made my own color index wave (2D matrix of 65535 rows, 3 columns for rgb) that I would like to use on a range of images. In order to set the the first and last colors (c.f. ctab = {first, last, ctab, reverse} ) I know that you set the x-scaling of the color index wave. My issue is that you can only have one x-scaling for the color index wave meaning that every time you chance the scaling, the scaling applies to every image. The only way around this that I can think of is to duplicate the color index wave for each image and set the x-scaling. I would like to avoid this if possible as I will be working with quite a large number of images. Is there any other way to do this? Is there a way to save my color index wave into the default ctab popup menu?

Thanks,

Tom