This extension allows theme developers to target their layout updates to multiple layout handles at once.

###Installation Simply copy, paste the app directory merging with the app directory in your magento installation

OR use modman (skip to last step if you have used modman before)-

• In magento admin, go to System > Configuration > Advanced > Developer > Template Settings. Change Allow Symlinks to Yes, if it's not already.
• Get modman from its repo, by doing a git clone https://github.com/colinmollenhour/modman.git
• Copy modman to magento root cp modman/modman /path/to/magento/root/modman
• Inside magento root, do modman init
• Then run the command in your magento root modman clone https://github.com/mridul89/MultipleHandles.git.

###Usage After Installation, you can use an ifhandle attribute in your layout files. For example, this will only apply if both catalog_product_view & customer_logged_in handles exist

<catalog_product_view ifhandle="customer_logged_in">
    <reference name="content">
        ...
    </reference>
</catalog_product_view>

You can also use more than 1 layout handles in the attribute value, separate each one of them with spaces