On IA, a keyboard is selected during the kdmconfig part of install. To change this at any time after installation, use kdmconfig:
Exit CDE/OW to the command line.
Type kdmconfig -u (kdmconfig unconfigure).
Type kdmconfig to run the program.
Follow instructions to get a keyboard layout.
There are no `utilities' for either SPARC or IA (apart from standard UNIX tools such as xmodmap, pcmapkeys) bundled into Solaris 8 for switching keyboards.