script to manage file systems on unmanaged storage in the server pool.

 When I create a server pool and it asks me to associate libraries with the pool, it also offers me the option to

"Upload script to manage file systems on unmanaged storage in the server pool".

Where do I find more information about the Ops Center interface requirements of such a script?

Is this something I can use to create filesystems from an existing zpool rather than have Ops Center make a zpool out of a file (whether local or nfs) that I then use as zone roots, since zones boot from filesystems rather than from devices (unlike LDOMs which boot from a device, or pseudo-device)?