I don't know about the future of the KeyMap Manager profile, but you don't have to do that configuration manually on the TC75.
You can setup the device easily with a Remap File, as explained in TC75's Integrator Guide at page 149. Create a file with the name key-config.xml and copy it in the folder: /enterprise/device/settings/keypad/
You can do this copy file operation with StageNow or in your own application reducing further the manual intervention and the error possibilities.
Our Marketing would say this with: "Do Less, Stage More" :-)
Thanks a lot Pietro.