Ed,
This contest is not listed in the ADIF contest ID enumeration so there would be no interoperability with othe software?
However if you don't mind that then use the attached file to which I have added CQMMDX - Just save it to your C:\..............\Roaming\LogOM folder and allow it to overwrite the original file.
or, simply (and better) open the settings screen, on first screen check ADVANCED SETTINGS, press the CONTEST button, add your contest and this will be saved as CONTEST_USER.txt and preserved from being overwritten on newer releases