It doesn`t work to me
I've tried to do this, but it didn't work.
I have the Slackware 9.0 and a ABNT2 keyboard,
I decompressed an ABNT2 map.gz and reading the .map,
this file has the CCedilha key (code 38 with keymaps), that's ok.
But running loadkeys <kbmap> nothing changes.