[Galaxy S II Themes and Apps] gerryS2:
Hi, this is the configuration I used to make the recent apps similar to S5, I have used the configuration from S5 systemUI ;)

Open res/layout/system_bar_recent_item and replace all line with this:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout android:id="@id/recent_item" android:layout_width="wrap_content" android:layout_height="wrap_content"
xmlns:android="http://schemas.android.com/apk/res/android">
<FrameLayout android:gravity="center" android:id="@id/recents_item_background_shadow" android:background="#ff005764" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="6.0dip" android:foreground="@drawable/tw_recents_app_bg">
<ImageView android:layout_gravity="center" android:id="@id/recents_item_background" android:layout_width="@dimen/tw_status_bar_recents_panel_bg_width" android:layout_height="@dimen/tw_status_bar_recents_panel_bg_height" />
</FrameLayout>
<TextView android:textSize="@dimen/status_bar_recents_app_label_text_size_s5" android:textColor="@color/status_bar_recents_app_label_color" android:ellipsize="marquee" android:id="@id/app_label" android:paddingTop="2.0dip" android:fadingEdge="horizontal" android:fadingEdgeLength="@dimen/status_bar_recents_text_fading_edge_length" android:layout_width="@dimen/tw_status_bar_recents_app_label_width" android:layout_height="wrap_content" android:layout_marginLeft="@dimen/tw_status_bar_recents_app_label_left_margin_s5" android:layout_marginTop="@dimen/tw_status_bar_recents_app_label_top_margin_s5" android:scrollHorizontally="true" android:singleLine="true" android:layout_alignTop="@id/app_icon" android:layout_alignParentLeft="true" />
<FrameLayout android:gravity="center" android:id="@id/app_thumbnail" android:background="@drawable/recents_thumbnail_bg" android:visibility="invisible" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="@dimen/tw_status_bar_recents_thumbnail_left_margin_s" android:foreground="@drawable/recents_thumbnail_fg" android:layout_toRightOf="@id/app_label" android:layout_alignParentTop="true">
<ImageView android:layout_gravity="center" android:id="@id/app_thumbnail_image" android:layout_width="@dimen/tw_status_bar_recents_thumbnail_width" android:layout_height="@dimen/tw_status_bar_recents_thumbnail_width" android:scaleType="centerInside" />
</FrameLayout>
<View android:id="@id/recents_callout_line" android:background="#99ffffff" android:visibility="gone" android:layout_width="@dimen/tw_status_bar_recents_app_label_width" android:layout_height="1.0dip" android:layout_marginLeft="@dimen/status_bar_recents_app_label_left_margin_s" android:layout_marginTop="3.0dip" android:layout_marginRight="3.0dip" android:layout_toLeftOf="@id/app_thumbnail" android:layout_below="@id/app_label" android:layout_alignParentLeft="true" />
<ImageView android:layout_gravity="top" android:id="@id/app_icon" android:visibility="invisible" android:layout_width="@dimen/status_bar_recents_app_icon_width_s" android:layout_height="@dimen/status_bar_recents_app_icon_height_s" android:layout_marginLeft="@dimen/tw_status_bar_recents_app_icon_left_margin_s" android:layout_marginTop="@dimen/tw_status_bar_recents_app_icon_top_margin_s" android:scaleType="centerInside" android:adjustViewBounds="true" android:layout_alignParentLeft="true" />
<TextView android:textSize="@dimen/status_bar_recents_app_description_text_size" android:ellipsize="marquee" android:id="@id/app_description" android:fadingEdge="horizontal" android:fadingEdgeLength="@dimen/status_bar_recents_text_fading_edge_length" android:layout_width="@dimen/tw_status_bar_recents_app_label_width" android:layout_height="wrap_content" android:layout_marginTop="0.0dip" android:scrollHorizontally="true" android:singleLine="true" android:textAlignment="viewStart" android:layout_marginStart="@dimen/tw_status_bar_recents_app_label_left_margin_s5" android:layout_marginRight="170.0dip" />
</RelativeLayout>

Then open res/layout-port/status_bar_recent_item and replace all line with this:

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout android:layout_gravity="center" android:paddingTop="@dimen/status_bar_recents_item_padding" android:paddingBottom="@dimen/status_bar_recents_item_padding" android:layout_width="fill_parent" android:layout_height="wrap_content"
xmlns:android="http://schemas.android.com/apk/res/android">
<RelativeLayout android:layout_gravity="center_horizontal" android:id="@id/recent_item" android:layout_width="wrap_content" android:layout_height="wrap_content">
<FrameLayout android:gravity="center" android:id="@id/recents_item_background_shadow" android:background="#ff005764" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="6.0dip" android:foreground="@drawable/tw_recents_app_bg">
<ImageView android:layout_gravity="center" android:id="@id/recents_item_background" android:layout_width="@dimen/tw_status_bar_recents_panel_bg_width" android:layout_height="@dimen/tw_status_bar_recents_panel_bg_height" />
</FrameLayout>
<TextView android:textSize="@dimen/status_bar_recents_app_label_text_size_s5" android:textColor="@color/status_bar_recents_app_label_color" android:ellipsize="marquee" android:id="@id/app_label" android:paddingTop="2.0dip" android:fadingEdge="horizontal" android:fadingEdgeLength="@dimen/status_bar_recents_text_fading_edge_length" android:layout_width="@dimen/tw_status_bar_recents_app_label_width" android:layout_height="wrap_content" android:layout_marginLeft="@dimen/tw_status_bar_recents_app_label_left_margin_s5" android:layout_marginTop="@dimen/tw_status_bar_recents_app_label_top_margin_s5" android:scrollHorizontally="true" android:singleLine="true" android:layout_alignTop="@id/app_icon" android:layout_alignParentLeft="true" />
<FrameLayout android:gravity="center" android:id="@id/app_thumbnail" android:background="@drawable/recents_thumbnail_bg" android:visibility="invisible" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="@dimen/tw_status_bar_recents_thumbnail_left_margin_s" android:foreground="@drawable/recents_thumbnail_fg" android:layout_toRightOf="@id/app_label" android:layout_alignParentTop="true">
<ImageView android:layout_gravity="center" android:id="@id/app_thumbnail_image" android:layout_width="@dimen/tw_status_bar_recents_thumbnail_width" android:layout_height="@dimen/tw_status_bar_recents_thumbnail_height" android:scaleType="centerInside" />
</FrameLayout>
<View android:id="@id/recents_callout_line" android:background="#99ffffff" android:visibility="gone" android:layout_width="@dimen/tw_status_bar_recents_app_label_width" android:layout_height="1.0dip" android:layout_marginLeft="@dimen/status_bar_recents_app_label_left_margin_s" android:layout_marginTop="3.0dip" android:layout_marginRight="3.0dip" android:layout_toLeftOf="@id/app_thumbnail" android:layout_below="@id/app_label" android:layout_alignParentLeft="true" />
<ImageView android:layout_gravity="top" android:id="@id/app_icon" android:visibility="invisible" android:layout_width="@dimen/status_bar_recents_app_icon_width_s" android:layout_height="@dimen/status_bar_recents_app_icon_height_s" android:layout_marginLeft="@dimen/tw_status_bar_recents_app_icon_left_margin_s" android:layout_marginTop="@dimen/tw_status_bar_recents_app_icon_top_margin_s" android:scaleType="centerInside" android:adjustViewBounds="true" android:layout_alignParentLeft="true" />
<TextView android:textSize="@dimen/status_bar_recents_app_description_text_size" android:ellipsize="marquee" android:id="@id/app_description" android:fadingEdge="horizontal" android:fadingEdgeLength="@dimen/status_bar_recents_text_fading_edge_length" android:layout_width="@dimen/tw_status_bar_recents_app_label_width" android:layout_height="wrap_content" android:layout_marginTop="0.0dip" android:scrollHorizontally="true" android:singleLine="true" android:textAlignment="viewStart" android:layout_marginStart="@dimen/tw_status_bar_recents_app_label_left_margin_s5" android:layout_marginRight="170.0dip" />
</RelativeLayout>
</FrameLayout>

Add this line in dimes.xml

<dimen name="tw_status_bar_recents_panel_bg_width">274.0dip</dimen>
<dimen name="tw_status_bar_recents_panel_bg_height">122.0dip</dimen>
<dimen name="tw_status_bar_recents_app_label_top_margin_s5">85.0dip</dimen>
<dimen name="tw_status_bar_recents_app_label_left_margin_s5">13.0dip</dimen>
<dimen name="status_bar_recents_app_label_text_size_s5">18.0dip</dimen>
<dimen name="status_bar_recents_app_label_left_margin_s">0.0dip</dimen>
<dimen name="status_bar_recents_app_icon_width_s">43.0dip</dimen>
<dimen name="status_bar_recents_app_icon_height_s">43.0dip</dimen>
<dimen name="tw_status_bar_recents_app_icon_left_margin_s">2.0dip</dimen>
<dimen name="tw_status_bar_recents_app_label_width">106.0dip</dimen>
<dimen name="tw_status_bar_recents_thumbnail_left_margin_s">0.0dip</dimen>
<dimen name="tw_status_bar_recents_thumbnail_top_margin_s">0.0dip</dimen>
<dimen name="status_bar_recents_item_padding_s5">5.0dip</dimen>
<dimen name="tw_status_bar_recents_thumbnail_width">164.0dip</dimen>
<dimen name="tw_status_bar_recents_thumbnail_height">145.0dip</dimen>
<dimen name="tw_status_bar_recents_app_label_bottom_margin_s5">15.0dip</dimen>
<dimen name="tw_status_bar_recents_app_icon_top_margin_s">7.0dip</dimen>
<dimen name="status_bar_recents_text_description_padding_s5">8.0dip</dimen>
<dimen name="tw_status_bar_recents_text_width_s2">170.0dip</dimen>