[Android Themes] lacoursiere18:
Hey man not sure if you ever figured this out? I got mine all centered.. Maybe I can help you

Lets take a look, the files I modded were:

sec_dual_clock.xml

sec_single_clock.xml

sec_adaptive_event_container_small.xml

In sec_dual_clock.xml I edited this line:

<LinearLayout [COLOR="Red"]android:layout_gravity="center_vertical"[/COLOR] android:layout_width="wrap_content" android:layout_height="wrap_content">
<com.android.keyguard.sec.SecKeyguardTextClock android:textSize="@dimen/kg_widget_dual_ampm_text_size" android:textColor="#ffffffff" android:layout_gravity="bottom" android:id="@id/roaming_ampm_kor" android:clickable="false" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginRight="5.0dip" android:shadowColor="#cc000000" android:textAllCaps="true" android:format12Hour="@string/status_view_ampm_for_12_hours" android:format24Hour="@string/status_view_ampm_for_24_hours" style="@style/keyguard_text_shadow" />
<com.android.keyguard.sec.SecKeyguardTextClock android:textSize="@dimen/kg_dualclock_time_text_size" android:textColor="#ffffffff" android:layout_gravity="center_vertical" android:id="@id/roaming_time" android:clickable="false" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginRight="5.0dip" android:shadowColor="#cc000000" android:format12Hour="@string/status_view_12_hours_format" android:format24Hour="@string/status_view_24_hours_format" style="@style/keyguard_text_shadow" />
<com.android.keyguard.sec.SecKeyguardTextClock android:textSize="@dimen/kg_widget_dual_ampm_text_size" android:textColor="#ffffffff" android:layout_gravity="bottom" android:id="@id/roaming_ampm" android:clickable="false" android:layout_width="wrap_content" android:layout_height="wrap_content" android:shadowColor="#cc000000" android:textAllCaps="true" android:format12Hour="@string/status_view_ampm_for_12_hours" android:format24Hour="@string/status_view_ampm_for_24_hours" style="@style/keyguard_text_shadow" />
</LinearLayout>

For sec_single_clock.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout [COLOR="red"]android:gravity="center_horizontal"[/COLOR] android:orientation="vertical" android:id="@id/keyguard_single_clock" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_marginLeft="@dimen/kg_singleclock_margin_left" android:layout_marginTop="@dimen/kg_singleclock_margin_top" android:layout_marginRight="@dimen/kg_singleclock_margin_right"
xmlns:android="http://schemas.android.com/apk/res/android">
<LinearLayout android:gravity="bottom" [COLOR="red"]android:layout_gravity="center_horizontal"[/COLOR] android:orientation="horizontal" android:id="@id/keyguard_single_clock_total" android:focusable="true" android:clickable="true" android:layout_width="wrap_content" android:layout_height="@dimen/kg_singleclock_height">
<com.android.keyguard.sec.SecKeyguardTextClock [COLOR="red"]android:textSize="16.0dip"[/COLOR] android:textColor="#ffffffff" android:id="@id/keyguard_single_clock_ampm_kor" android:clickable="false" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginRight="5.0dip" android:shadowColor="#cc000000" android:textAllCaps="true" android:format12Hour="@string/status_view_ampm_for_12_hours" android:format24Hour="@string/status_view_ampm_for_24_hours" style="@style/keyguard_text_shadow" />
<com.android.keyguard.sec.SecKeyguardTextClock android:textSize="@dimen/kg_singleclock_time_text_size_normal" android:textColor="#ffffffff" android:gravity="bottom" android:id="@id/keyguard_single_clock_time" android:clickable="false" android:layout_width="wrap_content" android:layout_height="wrap_content" android:shadowColor="#cc000000" android:format12Hour="@string/status_view_12_hours_format" android:format24Hour="@string/status_view_24_hours_format" style="@style/keyguard_text_shadow" />
<com.android.keyguard.sec.SecKeyguardTextClock [COLOR="red"]android:textSize="16.0dip"[/COLOR] android:textColor="#ffffffff" android:id="@id/keyguard_single_clock_ampm" android:clickable="false" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="5.0dip" android:shadowColor="#cc000000" android:textAllCaps="true" android:format12Hour="@string/status_view_ampm_for_12_hours" android:format24Hour="@string/status_view_ampm_for_24_hours" style="@style/keyguard_text_shadow" />
</LinearLayout>
<LinearLayout [COLOR="red"]android:layout_gravity="center_horizontal"[/COLOR] android:orientation="horizontal" android:layout_width="wrap_content" android:layout_height="wrap_content">
<TextView android:textSize="@dimen/kg_widget_common_date_text_size" android:textColor="#ffffffff" android:id="@id/keyguard_single_clock_date" android:clickable="true" android:layout_width="wrap_content" android:layout_height="wrap_content" android:shadowColor="#cc000000" android:fontFamily="sans-serif" style="@style/keyguard_text_shadow" />
<View [COLOR="red"]android:visibility="gone"[/COLOR] android:layout_width="20.0dip" android:layout_height="0.0dip" />
<include layout="@layout/sec_alarm" />
</LinearLayout>
<include layout="@layout/sec_owner_info" />
<include layout="@layout/sec_travel_info" />
</LinearLayout>

Then lastly sec_adaptive_event_container_small.xml:

<?xml version="1.0" encoding="utf-8"?>
<com.android.keyguard.sec.AdaptiveEventContainerSmall android:gravity="center_vertical" android:orientation="horizontal" android:id="@id/adaptive_event_container_small" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_marginLeft="19.0dip" android:layout_marginRight="19.0dip"
xmlns:android="http://schemas.android.com/apk/res/android">
<LinearLayout android:gravity="center_vertical" android:orientation="horizontal" android:id="@id/emergency_container" android:layout_width="fill_parent" android:layout_height="wrap_content" />
<LinearLayout [COLOR="red"]android:layout_gravity="center_horizontal"[/COLOR] android:id="@id/adaptive_info_area" [COLOR="red"]android:layout_width="wrap_content" [/COLOR][COLOR="red"][COLOR="red"]android:layout_height="wrap_content" android:layout_marginTop="6.0dip"[/COLOR][/COLOR] [COLOR="red"]android:layout_marginBottom="15.0dip"[/COLOR]>
<LinearLayout android:gravity="center_vertical" android:orientation="horizontal" android:id="@id/weather_container" [COLOR="red"]android:layout_width="wrap_content" android:layout_height="fill_parent"[/COLOR] />
<LinearLayout android:gravity="center_vertical" android:orientation="horizontal" android:id="@id/ped_container" android:layout_width="wrap_content" [COLOR="red"]android:layout_height="fill_parent"[/COLOR] />
</LinearLayout>
</com.android.keyguard.sec.AdaptiveEventContainerSmall>

See if that helps you. If not, have you looked in any other layout folders?