David,
Because we will never get matching templates (

) probably the easiest way would be to add a section in jAlbum settings, maybe looking like this.
Integrate with WebSite X5 yes/no
If yes
First level directory name jAlbum-(name of project) ## allow keyin.
Home button to top level yes/no ## up arrow appears even though at top of jAlbum.
Name of top level HTML index.html (default) ## allow keyin
This is very similar to what I've done by hand, except I've had to add an icon with the name "Home" (takes you to top level) in the topmost level of jAlbum.
Just a thought. Nigel.