If you would like to change your keyboard layout/mapping, you have a few options.
(1) Set up a different layout using loadkmap. See the FAQ: http://tinycorelinux.com/faq.html#keyboard
Again … exit to prompt to make the change. Confirm you have the right settings, then adjust your bootlocal.sh or bootcodes to suit.
(2) Install the Xorg extension, and use the terminal command setxkbmap to change maps. If you'd like to use Xorg … this is a painless solution.
(3) Make custom changes using xmodmap. For a tutorial on how to capture keycodes and adjust a custom xmodmap configuration, see:
http://cweiske.de/howto/xmodmap/allinone.html
Weiske mentions using the command 'xev' to inspect various keycodes. xev is available from the Xorg extension.