Facebook Business Page developer

Hi,

We currently have a working Facebook application, Which we have used with our current clients,

We have since taken over from a previous developer and unsure how to add the applications to multiple clients facebook pages.

We need assistance adding it to the tabs on our customers pages.

Only apply if you understand how to add custom apps to multple facebook pages.

Over all we only require someone to assist with adding the app to the facebook page or showing us how.

Thanks