For using two keyboard maps (Czech and English), edit your /opt/ltsp/i386/etc/build_4x_cfg file:

#----- 
       Option      "XkbRules"  "${XKBRULES}"
       Option      "XkbCompat" "${XKBCOMPAT}"
       Option      "XkbOptions" "${XKBOPTIONS}"
#------ 

Set values in lts.conf file:

        XkbRules           = "xfree86"
        XkbLayout          = "cz,us"
        XkbCompat          = "group_led"
        XkbOptions         = "grp:ctrl_shift_toggle,grp:switch"

This example set the Ctrl+Shift for switching the keyb. maps (cz, us). Led is on with us-keyb. map. For correct switching to text console (Ctr+Alt+Fn) edit your /opt/ltsp/i386/usr/X11R6/lib/X11/xkb/compat/group_led:

  # --- added line ---
  augment "xfree86"

-- OndrejRusek - 25 May 2005