[Samsung Galaxy Young S6310] isaak:
This is my code if you want a lighter touchwiz and with secsettings layout fixed by default (no need to edit androidmanifest).

In res/values/styles.xml after decompiling framework-res.apk, search for

<style name="Theme.DeviceDefault" parent="@style/Theme.Holo">

and replace it with this code :

<style name="Theme.DeviceDefault" parent="@style/Theme.Holo">
<item name="textAppearance">@style/TextAppearance.Holo</item>
<item name="textAppearanceInverse">@style/TextAppearance.Holo.Inverse</item>
<item name="textAppearanceLarge">@style/TextAppearance.Holo.Large</item>
<item name="textAppearanceMedium">@style/TextAppearance.Holo.Medium</item>
<item name="textAppearanceSmall">@style/TextAppearance.Holo.Small</item>
<item name="textAppearanceLargeInverse">@style/TextAppearance.Holo.Large.Inverse</item>
<item name="textAppearanceMediumInverse">@style/TextAppearance.Holo.Medium.Inverse</item>
<item name="textAppearanceSmallInverse">@style/TextAppearance.Holo.Small.Inverse</item>
<item name="buttonStyle">@style/Widget.Holo.Button</item>
<item name="buttonStyleSmall">@style/Widget.Holo.Button.Small</item>
<item name="buttonStyleInset">@style/Widget.Holo.Button.Inset</item>
<item name="buttonStyleToggle">@style/Widget.Holo.Button.Toggle</item>
<item name="windowBackground">@drawable/tw_background_holo_dark</item>
<item name="windowTitleStyle">@style/WindowTitle.Holo</item>
<item name="windowTitleBackgroundStyle">@style/WindowTitleBackground.Holo</item>
<item name="alertDialogStyle">@style/AlertDialog.DeviceDefault</item>
<item name="panelBackground">@drawable/tw_menu_hardkey_panel_holo_dark</item>
<item name="absListViewStyle">@style/Widget.DeviceDefault.AbsListView</item>
<item name="autoCompleteTextViewStyle">@style/Widget.Holo.AutoCompleteTextView</item>
<item name="checkboxStyle">@style/Widget.Holo.CompoundButton.CheckBox</item>
<item name="dropDownListViewStyle">@style/Widget.Holo.ListView.DropDown</item>
<item name="editTextStyle">@style/Widget.Holo.EditText</item>
<item name="expandableListViewStyle">@style/Widget.DeviceDefault.ExpandableListView</item>
<item name="galleryStyle">@style/Widget.Holo.Gallery</item>
<item name="gridViewStyle">@style/Widget.Holo.GridView</item>
<item name="imageButtonStyle">@style/Widget.Holo.ImageButton</item>
<item name="imageWellStyle">@style/Widget.Holo.ImageWell</item>
<item name="listViewStyle">@style/Widget.DeviceDefault.ListView</item>
<item name="listViewWhiteStyle">@style/Widget.Holo.ListView.White</item>
<item name="popupWindowStyle">@style/Widget.Holo.PopupWindow</item>
<item name="progressBarStyle">@style/Widget.DeviceDefault.ProgressBar</item>
<item name="progressBarStyleHorizontal">@style/Widget.DeviceDefault.ProgressBar.Horizontal</item>
<item name="progressBarStyleSmall">@style/Widget.DeviceDefault.ProgressBar.Small</item>
<item name="progressBarStyleLarge">@style/Widget.DeviceDefault.ProgressBar.Large</item>
<item name="seekBarStyle">@style/Widget.Holo.SeekBar</item>
<item name="ratingBarStyle">@style/Widget.Holo.RatingBar</item>
<item name="ratingBarStyleSmall">@style/Widget.Holo.RatingBar.Small</item>
<item name="radioButtonStyle">@style/Widget.Holo.CompoundButton.RadioButton</item>
<item name="scrollViewStyle">@style/Widget.Holo.ScrollView</item>
<item name="spinnerStyle">?dropDownSpinnerStyle</item>
<item name="starStyle">@style/Widget.Holo.CompoundButton.Star</item>
<item name="tabWidgetStyle">@style/Widget.DeviceDefault.TabWidget</item>
<item name="textViewStyle">@style/Widget.DeviceDefault.TextView</item>
<item name="webViewStyle">@style/Widget.DeviceDefault.WebView</item>
<item name="dropDownItemStyle">@style/Widget.Holo.DropDownItem</item>
<item name="spinnerDropDownItemStyle">@style/Widget.Holo.DropDownItem.Spinner</item>
<item name="dropDownHintAppearance">@style/TextAppearance.Holo.Widget.DropDownHint</item>
<item name="spinnerItemStyle">@style/Widget.Holo.TextView.SpinnerItem</item>
<item name="preferenceScreenStyle">@style/Preference.DeviceDefault.PreferenceScreen</item>
<item name="preferenceCategoryStyle">@style/Preference.DeviceDefault.Category</item>
<item name="preferenceInformationStyle">@style/Preference.DeviceDefault.Information</item>
<item name="preferenceStyle">@style/Preference.DeviceDefault</item>
<item name="checkBoxPreferenceStyle">@style/Preference.DeviceDefault.CheckBoxPreference</item>
<item name="yesNoPreferenceStyle">@style/Preference.DeviceDefault.DialogPreference.YesNoPreference</item>
<item name="dialogPreferenceStyle">@style/Preference.DeviceDefault.DialogPreference</item>
<item name="editTextPreferenceStyle">@style/Preference.DeviceDefault.DialogPreference.EditTextPreference</item>
<item name="ringtonePreferenceStyle">@style/Preference.DeviceDefault.RingtonePreference</item>
<item name="preferenceLayoutChild">@layout/tw_preference_child_holo</item>
<item name="windowAnimationStyle">@style/Animation.DeviceDefault.Activity</item>
<item name="textAppearanceButton">@style/TextAppearance.DeviceDefault.Widget.Button</item>
<item name="listSeparatorTextViewStyle">@style/Widget.Holo.TextView.ListSeparator</item>
<item name="progressBarStyleSmallTitle">@style/Widget.DeviceDefault.ProgressBar.Small.Title</item>
<item name="ratingBarStyleIndicator">@style/Widget.DeviceDefault.RatingBar.Indicator</item>
<item name="listDivider">@drawable/tw_list_divider_holo_dark</item>
<item name="listChoiceIndicatorSingle">@drawable/tw_btn_radio_holo_dark</item>
<item name="listChoiceIndicatorMultiple">@drawable/tw_btn_check_holo_dark</item>
<item name="progressBarStyleInverse">@style/Widget.DeviceDefault.ProgressBar.Inverse</item>
<item name="progressBarStyleSmallInverse">@style/Widget.DeviceDefault.ProgressBar.Small.Inverse</item>
<item name="progressBarStyleLargeInverse">@style/Widget.DeviceDefault.ProgressBar.Large.Inverse</item>
<item name="textAppearanceSearchResultSubtitle">@style/TextAppearance.DeviceDefault.SearchResult.Subtitle</item>
<item name="textAppearanceSearchResultTitle">@style/TextAppearance.DeviceDefault.SearchResult.Title</item>
<item name="scrollbarFadeDuration">@integer/scrollbar_fade_duration</item>
<item name="quickContactBadgeStyleWindowSmall">@style/Widget.DeviceDefault.QuickContactBadge.WindowSmall</item>
<item name="quickContactBadgeStyleWindowMedium">@style/Widget.DeviceDefault.QuickContactBadge.WindowMedium</item>
<item name="quickContactBadgeStyleWindowLarge">@style/Widget.DeviceDefault.QuickContactBadge.WindowLarge</item>
<item name="quickContactBadgeStyleSmallWindowSmall">@style/Widget.DeviceDefault.QuickContactBadgeSmall.WindowSmall</item>
<item name="quickContactBadgeStyleSmallWindowMedium">@style/Widget.DeviceDefault.QuickContactBadgeSmall.WindowMedium</item>
<item name="quickContactBadgeStyleSmallWindowLarge">@style/Widget.DeviceDefault.QuickContactBadgeSmall.WindowLarge</item>
<item name="expandableListViewWhiteStyle">@style/Widget.DeviceDefault.ExpandableListView.White</item>
<item name="webTextViewStyle">@style/Widget.DeviceDefault.WebTextView</item>
<item name="textSelectHandleLeft">@drawable/text_select_handle_left</item>
<item name="textSelectHandleRight">@drawable/text_select_handle_right</item>
<item name="textSelectHandle">@drawable/text_select_handle_middle</item>
<item name="textSelectHandleWindowStyle">@style/Widget.DeviceDefault.TextSelectHandle</item>
<item name="actionBarStyle">@style/Widget.DeviceDefault.ActionBar</item>
<item name="dropDownSpinnerStyle">@style/Widget.Holo.Spinner.DropDown</item>
<item name="actionDropDownStyle">@style/Widget.Holo.Spinner.DropDown.ActionBar</item>
<item name="actionButtonStyle">@style/Widget.Holo.ActionButton</item>
<item name="actionModeBackground">@drawable/tw_ab_transparent_dark_holo</item>
<item name="actionModeCloseDrawable">@drawable/ic_cab_done_holo_dark</item>
<item name="listChoiceBackgroundIndicator">@drawable/list_selector_holo_dark</item>
<item name="actionBarTabStyle">@style/Widget.DeviceDefault.ActionBar.TabView</item>
<item name="actionBarTabBarStyle">@style/Widget.DeviceDefault.ActionBar.TabBar</item>
<item name="actionBarTabTextStyle">@style/Widget.DeviceDefault.ActionBar.TabText</item>
<item name="actionOverflowButtonStyle">@style/Widget.Holo.ActionButton.Overflow</item>
<item name="actionModeCloseButtonStyle">@style/Widget.Holo.ActionButton.CloseMode</item>
<item name="listPopupWindowStyle">@style/Widget.Holo.ListPopupWindow</item>
<item name="popupMenuStyle">@style/Widget.Holo.PopupMenu</item>
<item name="textAppearanceLargePopupMenu">@style/TextAppearance.Holo.Widget.PopupMenu.Large</item>
<item name="textAppearanceSmallPopupMenu">@style/TextAppearance.Holo.Widget.PopupMenu.Small</item>
<item name="textColorAlertDialogListItem">@color/tw_popup_primary_text_holo_dark</item>
<item name="dialogTheme">@style/Theme.DeviceDefault.Dialog</item>
<item name="alertDialogTheme">@style/Theme.DeviceDefault.Dialog.Alert</item>
<item name="homeAsUpIndicator">@drawable/tw_ic_ab_back_holo_dark</item>
<item name="actionModeCutDrawable">@drawable/ic_menu_cut_holo_dark</item>
<item name="actionModeCopyDrawable">@drawable/ic_menu_copy_holo_dark</item>
<item name="actionModePasteDrawable">@drawable/ic_menu_paste_holo_dark</item>
<item name="borderlessButtonStyle">@style/Widget.DeviceDefault.Button.Borderless</item>
<item name="buttonBarStyle">@style/Holo.ButtonBar</item>
<item name="buttonBarButtonStyle">?borderlessButtonStyle</item>
<item name="segmentedButtonStyle">@style/DeviceDefault.SegmentedButton</item>
<item name="editTextBackground">@drawable/edit_text_holo_dark</item>
<item name="horizontalScrollViewStyle">@style/Widget.Holo.HorizontalScrollView</item>
<item name="alertDialogIcon">@drawable/ic_dialog_alert_holo_dark</item>
<item name="datePickerStyle">@style/Widget.Holo.DatePicker</item>
<item name="calendarViewStyle">@style/Widget.Holo.CalendarView</item>
<item name="actionMenuTextAppearance">@style/TextAppearance.DeviceDefault.Widget.ActionBar.Menu</item>
<item name="actionMenuTextColor">@color/tw_action_bar_menu_text_holo_dark</item>
<item name="switchPreferenceStyle">@style/Preference.DeviceDefault.SwitchPreference</item>
<item name="textSuggestionsWindowStyle">@style/Widget.Holo.TextSuggestionsPopupWindow</item>
<item name="actionModeSelectAllDrawable">@drawable/ic_menu_selectall_holo_dark</item>
<item name="actionModeStyle">@style/Widget.Holo.ActionMode</item>
<item name="actionBarDivider">@drawable/divider_vertical_holo_dark</item>
<item name="actionBarItemBackground">@drawable/tw_action_item_background_holo_dark</item>
<item name="actionModeSplitBackground">@drawable/tw_ab_transparent_dark_holo</item>
<item name="listPreferredItemPaddingLeft">17.0dip</item>
<item name="listPreferredItemPaddingRight">17.0dip</item>
<item name="actionBarNonEmbeded">false</item>
<item name="panelMenuListWidth">@dimen/tw_compactmenu_width</item>
<item name="panelMenuListTheme">@style/Theme.DeviceDefault.CompactMenu</item>
<item name="gestureOverlayViewStyle">@style/Widget.DeviceDefault.GestureOverlayView</item>
<item name="quickContactBadgeOverlay">@drawable/tw_quickcontact_badge_overlay_dark</item>
<item name="stackViewStyle">@style/Widget.DeviceDefault.StackView</item>
<item name="numberPickerStyle">@style/Widget.DeviceDefault.NumberPicker</item>
<item name="timePickerStyle">@style/Widget.DeviceDefault.TimePicker</item>
<item name="actionBarTitleShadowColor">@color/tw_action_bar_title_shadow_color_holo_dark</item>
<item name="actionBarTitleShadowDx">@dimen/tw_action_bar_title_shadow_dx_holo_dark</item>
<item name="actionMultiWindowButtonDrawable">@drawable/tw_ic_menu_cascade_holo_dark</item>
<item name="actionMultiWindowButtonBackground">@drawable/tw_btn_ab_mw_holo_dark</item>
<item name="actionBarTitleShadowDy">@dimen/tw_action_bar_title_shadow_dy_holo_dark</item>
<item name="actionModeShareDrawable">@drawable/tw_ic_menu_share_holo_dark</item>
<item name="actionModeFindDrawable">@drawable/tw_ic_menu_find_holo_dark</item>
<item name="actionModeWebSearchDrawable">@drawable/tw_ic_menu_search_holo_dark</item>
<item name="actionModePopupWindowStyle">@style/Widget.Holo.PopupWindow.ActionMode</item>
<item name="preferenceFragmentStyle">@style/PreferenceFragment</item>
<item name="preferenceActivityLayout">@layout/preference_list_content</item>
<item name="preferenceHeaderItemLayout">@layout/tw_preference_header_item_holo_dark</item>
<item name="fragmentBreadCrumbItemLayout">@layout/fragment_bread_crumb_item</item>
<item name="dialogTitleIconsDecorLayout">@layout/dialog_title_icons_holo</item>
<item name="actionModeClipboardDrawable">@drawable/tw_ic_menu_clipboard_holo_dark</item>
<item name="textSelectHandleLeftTop">@drawable/text_select_handle_left</item>
<item name="textSelectHandleRightTop">@drawable/text_select_handle_right</item>
<item name="searchViewCloseIcon">@drawable/tw_ic_clear</item>
<item name="searchViewGoIcon">@drawable/ic_go</item>
<item name="searchViewSearchIcon">@drawable/ic_search</item>
<item name="searchViewVoiceIcon">@drawable/ic_voice_search</item>
<item name="searchViewEditQuery">@drawable/ic_commit_search_api_holo_dark</item>
<item name="searchViewEditQueryBackground">@drawable/tw_item_background_holo_dark</item>
<item name="searchViewTextField">@drawable/tw_textfield_searchview_holo_dark</item>
<item name="searchViewTextFieldRight">@drawable/tw_textfield_searchview_right_holo_dark</item>
<item name="searchViewTextColor">@color/tw_textfield_searchview_text_holo_dark</item>
<item name="twTextColorPrimary">@color/primary_text_holo_dark</item>
<item name="twTextColorSecondary">@color/secondary_text_holo_dark</item>
<item name="twTextSizePrimary">22.0sp</item>
<item name="twTextSizeSecondary">17.0dip</item>
<item name="twPreferencePaddingLeft">8.0dip</item>
<item name="dialogTitleDecorLayout">@layout/dialog_title_holo</item>
<item name="toastFrameBackground">@drawable/tw_toast_frame_holo_dark</item>
<item name="toastTextColor">@color/tw_toast_text_holo_dark</item>
<item name="toastTextShadowColor">@color/tw_toast_text_shadow_holo_dark</item>
<item name="searchDropdownBackground">@drawable/tw_spinner_dropdown_background</item>
<item name="searchViewSearchFieldIcon">@drawable/tw_ic_searchfield</item>
<item name="searchDialogTheme">@style/Theme.Holo.SearchBar</item>
<item name="preferenceFrameLayoutStyle">@style/Widget.DeviceDefault.PreferenceFrameLayout</item>
<item name="switchStyle">@style/Widget.Holo.CompoundButton.Switch</item>
<item name="ProgressDialogStyle">@style/AlertDialog.DeviceDefault.ProgressDialog</item>
<item name="parentIsDeviceDefault">true</item>
<item name="keyboardViewStyle">@style/Widget.DeviceDefault.KeyboardView</item>
</style>

To exclude vertical dividers and/or to change switch buttons in Settings, please read my previous post.