Sorry, I am out of ideas. I do not see any other means of doing this from your list of functions. I think your v5 version of IM is just too old to have a means of doing that. The only thing I can think of is to compile IM from source after installing all the needed delegates. You might search the forum to see if others have had any success in installing IM from source or binary on your platform.
Perhaps one of the IM developers might know more about your version of IM and platform. You might post on the developers forum and link back to here.
grayscale to color
Re: grayscale to color
fmw42: Thank you very much for your assistance