Hi Nwanku,
Maybe I am wrong, I don't think you can include or reload other *.xhtml files from other wars.
But if you happen to use
Maven to build your applications, the Maven
overlays plugin is probably an option.
Basically, the whole idea is you extract the common web resources (such as template files, images) shared by
applications into a common artifact, and then allow maven to use this plugin to build this common resources into your wars.
As result, all wars built in this way will have the same style and layout.
Not sure if this can solve your problem. The plugin can be declared in POM.xml as follows:
By the way, here is the link you can find more information:
http://maven.apache.org/plugins/maven-war-plugin/overlays.html