Add new layout to magento for output category - magento

Question

I have custom layout for category.
<CATEGORY_8>
<reference name="root">
<action method="setTemplate"><template>page/category_8.phtml</template></action>
</reference>
<reference name="left">
<block type="catalog/category_view" name="catalog.leftnav.within" before="-" template="catalog/layer/within.phtml "/>
</reference>
<reference name="category.products">
<action method="setTemplate"><template>catalog/category/8/view.phtml</template></action>
</reference>
<reference name="catalog.leftnav">
<action method="setTemplate"><template>catalog/layer/view_8.phtml</template></action>
</reference>
<reference name="product_list">
<action method="setTemplate"><template>catalog/product/list_8.phtml</template></action>
</reference>
</CATEGORY_8>
I want create new layout and I want apply this layout for category.
I created new layout
<page_new_new module="page" translate="label">
<label>Layout new</label>
<template>page/category_8.phtml</template>
<layout_handle>page_new_new</layout_handle>
</page_new_new>
How I can setup templates for this layout?
I don't want using "Custom Layout Update" field inside admin.
I want use only "Page Layout" field?

Answer 1

I would insert the layout xml block (your first code part with CATEGORY_8) into design/frontend/*/*/layout/page.xml (your actual frontend design folder, most possibly default/default) and create an extension with a simple config.xml, something like this:
<?xml version="1.0"?>
<config>
<global>
<page>
<layouts>
<page_new_new module="page" translate="label">
<label>Layout new</label>
<template>page/category_8.phtml</template>
<layout_handle>page_new_new</layout_handle>
</page_new_new>
</layouts>
</page>
</global>
</config>
To create an extension just create the folder structure in your app/code/local directory:
YourCompanyName/ModuleNameYouLike/etc
and put this [config.xml] in, you will also need an xml file in app/etc/modules directory:
<?xml version="1.0" encoding="UTF-8"?>
<config>
<modules>
<YourCompanyName_ModuleNameYouLike>
<active>true</active>
<codePool>local</codePool>
<depends>
<Mage_Page />
</depends>
</YourCompanyName_ModuleNameYouLike>
</modules>
</config>
After refreshing configuration and layout cache you will see Layout new for pages from the Page layout dropdown.