[Samsung Galaxy Nexus] creeve4:
There are a few things I changed about the layout of the lock screen:

1. Taller Minimized Widgets:

View attachment 1644926

2. Removed Unlock Icon and Outer Ring:

View attachment 1644927

3. Smaller Margins:

View attachment 1644928

4. Music Player (black background only under title and controls):

View attachment 1644929

I used the framework file from MR1 build 1 to create this.

View attachment 1644931 Use ZipThemer (get it for free on Google Play) to create a flashable zip.

Tutorial:

1. Decompile framework-res.apk

2. Modify the following files (green = add/change this text, red = remove this text):

ic_lockscreen_outerring.xml in \res\drawable

<?xml version="1.0" encoding="utf-8"?>
<shape android:shape="oval"
xmlns:android="http://schemas.android.com/apk/res/android">
<size android:height="@dimen/keyguard_lockscreen_outerring_diameter" android:width="@dimen/keyguard_lockscreen_outerring_diameter" />
<solid android:color="#00000000" />
<stroke android:width="[COLOR="LimeGreen"]0.0dip[/COLOR]" android:color="#1affffff" />
</shape>

ic_lockscreen_player_background.9.png in \res\drawable-xhdpi

Open with Photoshop, GIMP, etc... Delete the image inside the bounding boxes (make it a transparent image).

ic_lockscreen_unlock_normal.png in \res\drawable-xhdpi

Open with Photoshop, GIMP, etc... Delete the image (make it a transparent image).

keyguard_transport_control_view.xml in \res\layout

<?xml version="1.0" encoding="utf-8"?>
<com.android.internal.policy.impl.keyguard.KeyguardTransportControlView android:gravity="center_horizontal" android:id="@id/keyguard_transport_control" android:layout_width="wrap_content" android:layout_height="wrap_content"
xmlns:android="http://schemas.android.com/apk/res/android">
<FrameLayout android:layout_width="fill_parent" android:layout_height="fill_parent" android:foreground="[COLOR="Lime"]#00000000[/COLOR]" android:contentDescription="@string/keygaurd_accessibility_media_controls">
<ImageView android:layout_gravity="fill" android:id="@id/albumart" android:layout_width="fill_parent" android:layout_height="fill_parent" android:scaleType="centerCrop" android:adjustViewBounds="false" />
</FrameLayout>
<LinearLayout android:layout_gravity="bottom" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="wrap_content">
<TextView android:textAppearance="?textAppearanceMedium" android:ellipsize="end" android:gravity="center_horizontal" android:id="@id/title" android:layout_width="fill_parent" android:layout_height="wrap_content" [COLOR="lime"]android:background="#cc000000"[/COLOR] [COLOR="Lime"]android:padding="2.0dip"[/COLOR] [COLOR="Red"]android:layout_marginTop="8.0dip"[/COLOR] android:singleLine="[COLOR="lime"]false[/COLOR]" [COLOR="Red"]android:layout_marginStart="16.0dip" android:layout_marginEnd="16.0dip"[/COLOR] />
<LinearLayout android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="wrap_content" [COLOR="Lime"]android:background="#cc000000" [/COLOR][COLOR="red"]android:layout_marginTop="5.0dip"[/COLOR]>
<FrameLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_weight="1.0">
<ImageView android:layout_gravity="center" android:id="@id/btn_prev" android:background="?selectableItemBackground" android:padding="[COLOR="lime"]5.0dip[/COLOR]" android:clickable="true" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/ic_media_previous" android:contentDescription="@string/lockscreen_transport_prev_description" />
</FrameLayout>
<FrameLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_weight="1.0">
<ImageView android:layout_gravity="center" android:id="@id/btn_play" android:background="?selectableItemBackground" android:padding="[COLOR="lime"]5.0dip[/COLOR]" android:clickable="true" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/ic_media_play" android:contentDescription="@string/lockscreen_transport_play_description" />
</FrameLayout>
<FrameLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_weight="1.0">
<ImageView android:layout_gravity="center" android:id="@id/btn_next" android:background="?selectableItemBackground" android:padding="[COLOR="lime"]5.0dip[/COLOR]" android:clickable="true" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/ic_media_next" android:contentDescription="@string/lockscreen_transport_next_description" />
</FrameLayout>
</LinearLayout>
</LinearLayout>
</com.android.internal.policy.impl.keyguard.KeyguardTransportControlView>

keyguard_host_view.xml in \res\layout-port

<?xml version="1.0" encoding="utf-8"?>
<com.android.internal.policy.impl.keyguard.KeyguardHostView androidprv:gravity="center_horizontal" androidprv:orientation="vertical" androidprv:id="@id/keyguard_host_view" androidprv:layout_width="fill_parent" androidprv:layout_height="fill_parent"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:androidprv="http://schemas.android.com/apk/res/android">
<com.android.internal.policy.impl.keyguard.SlidingChallengeLayout androidprv:id="@id/sliding_layout" androidprv:layout_width="fill_parent" androidprv:layout_height="fill_parent">
<FrameLayout androidprv:layout_width="fill_parent" androidprv:layout_height="wrap_content" androidprv:layout_childType="pageDeleteDropTarget">
<include androidprv:layout_gravity="top|center" androidprv:id="@id/keyguard_widget_pager_delete_target" androidprv:layout_width="wrap_content" androidprv:layout_height="wrap_content" layout="@layout/keyguard_widget_remove_drop_target" />
</FrameLayout>
<FrameLayout androidprv:layout_width="fill_parent" androidprv:layout_height="fill_parent" androidprv:layout_childType="widgets">
<include androidprv:layout_gravity="center" androidprv:id="@id/app_widget_container" androidprv:layout_width="fill_parent" androidprv:layout_height="fill_parent" layout="@layout/keyguard_widget_pager" />
</FrameLayout>
<View androidprv:background="#99000000" androidprv:layout_width="fill_parent" androidprv:layout_height="fill_parent" androidprv:layout_childType="scrim" />
<com.android.internal.policy.impl.keyguard.KeyguardSecurityContainer androidprv:gravity="bottom|center" androidprv:id="@id/keyguard_security_container" androidprv:padding="0.0dip" androidprv:layout_width="wrap_content" androidprv:layout_height="wrap_content" androidprv:layout_maxHeight="[COLOR="Lime"]300.0dip[/COLOR]" androidprv:layout_childType="challenge">
<com.android.internal.policy.impl.keyguard.KeyguardSecurityViewFlipper androidprv:gravity="center" androidprv:id="@id/view_flipper" androidprv:paddingTop="@dimen/keyguard_security_view_margin" androidprv:clipChildren="false" androidprv:clipToPadding="false" androidprv:layout_width="fill_parent" androidprv:layout_height="fill_parent" />
</com.android.internal.policy.impl.keyguard.KeyguardSecurityContainer>
<ImageButton androidprv:background="@null" androidprv:focusable="true" androidprv:layout_width="fill_parent" androidprv:layout_height="@dimen/kg_widget_pager_bottom_padding" androidprv:src="@drawable/keyguard_expand_challenge_handle" androidprv:scaleType="center" androidprv:contentDescription="@string/keyguard_accessibility_expand_lock_area" androidprv:layout_childType="expandChallengeHandle" />
</com.android.internal.policy.impl.keyguard.SlidingChallengeLayout>
</com.android.internal.policy.impl.keyguard.KeyguardHostView>

keyguard_widget_pager.xml in \res\layout-port

<?xml version="1.0" encoding="utf-8"?>
<com.android.internal.policy.impl.keyguard.KeyguardWidgetPager android:id="@id/app_widget_container" android:paddingLeft="[COLOR="lime"]5.0dip[/COLOR]" android:paddingTop="[COLOR="lime"]5.0dip[/COLOR]" android:paddingRight="[COLOR="lime"]5.0dip[/COLOR]" android:paddingBottom="@dimen/kg_widget_pager_bottom_padding" android:clipToPadding="false" android:pageSpacing="10.0dip"
xmlns:androidprv="http://schemas.android.com/apk/res/android"
xmlns:android="http://schemas.android.com/apk/res/android" />

3. Recompile

4. Copy the modified files from the compiled framework-re.apk into the ZipThemer zip file that is attached above.