Endpointman- support for gxp2124 multipurpose keys

I have a challenge. I have 30 gxp2124s to deploy. Endpointman does a great job creating the config files except I haven’t figured out how to use it to configure the 24 multipurpose keys. It has support for 7 multipurpose keys. Any additional challenge is that all the multipurpose keys are to be configured the same. Any suggestions?