Leave alone:
idleConf
defaultCfg
userCfg
ext_defaultCfg
ext_userCfg

Custom replacement:
wm_withdraw  withdraw
listFontName  list_fonts
labelFontNameTitle  font_name_title
labelFontSizeTitle  font_size_title
labelFontSample  font_sample
labelSpaceNumTitle  indent_size_title
scaleSpaceNum  scale_indent_size
fgHilite  fg_bg_toggle
themeIsBuiltin is_builtin_theme
txTa  texttag
frameFgBg  frame_fg_bg_toggle
fgHilite  fg_bg_toggle
labelTypeTitle  theme_type_title
keysAreBuiltin  are_keys_builtin
keyBinding  keybinding
labelTargetTitle  target_title
autoSave  autosave
labelRunChoiceTitle  startup_title
labelRunSaveTitle  run_save_title
labelWinSizeTitle  win_size_title
labelWinWidthTitle  win_width_title
labelWinHeightTitle   win_height_title
frameHelpList  frame_helplist
frameHelpListButtons  frame_helplist_buttons
scrollHelpList  scroll_helplist
oldthemes  old_themes
oldkeys  old_keys
userHelpList  user_helplist