you could just make the keybind yourself
$remapdivision[$remapcount] = "Cloak";
$remapname[$remapcount] = "Activate";
$remapcmd[$remapcount] = "cloakme";
$remapcount++;
function cloakme(%a)
{
if(%a)
commandtoserver('cloak');
}
that makes it so when you press the keybind, it's like typing /cloak