For the most part, I understand how to apply the template to a creature, but I have just a few questions.
1. If a ghost had armor and weapons in life, when it becomes a ghost does it continue to use that same equipment?
2. Considering it lacks a strength score what stat does a ghost attack with?
From the Ghost and Incorporeal sections:
When a ghost is created, it retains incorporeal “copies” of any items that it particularly valued in life (provided the originals are not in another creature's possession). The equipment works normally for the ghost but passes harmlessly through material objects or creatures. A weapon of +1 or better magical enhancement, however, can harm material creatures, but any such attack deals only half as much damage (50%) unless it is a ghost touch weapon. A ghost can use shields or armor only if they have the ghost touch quality.
An incorporeal creature moves silently and cannot be heard with Perception checks if it doesn't wish to be. It has no Strength score, so its Dexterity modifier applies to its melee attacks, ranged attacks, and CMB. Nonvisual senses, such as scent and blindsight, are either ineffective or only partly effective with regard to incorporeal creatures. Incorporeal creatures have an innate sense of direction and can move at full speed even when they cannot see.