basically, you can copy them wherever you want. Just put the path of these binaries in your $PATH variable.... but, if you don't want to edit $PATH variable each time the cellphone boots, you can check your $PATH variable using telnet:
root:/# [color=green]echo $PATH[/color]
/mmc/mmca1/bin:/ezxlocal/bin:/usr/bin:/bin:/usr/sbin:/sbin
you can copy the show** binaries to any of these folders... AFAIK, only
/mmc/mmca1/bin and
/ezxlocal/bin are writeable (you must create these folders if you don't have them)