APM Templates

 Good morning,

 I have just started to use APM, I would like to create a template to monitor a complex application. The application consists of a clustered oracle database running on a number of Linux servers with a number of windows servers running various windows applications. Is it possible to create a single template to monitor the lot or should I create a number of discrete components. If the latter is the case can I nest a number of templates under one main template?