Are you sure about this? That you can install a "Pack installation file" (ppi) to moire than one keyboards?
I have the impression that every "Pack installation file" (ppi) already contain the .n27 keyboard ID so it is not possible to install it in more than one instruments.
It is "locked" to only one keyboard, since contains the .n27 keyboard ID
I have two different SX900 n27's installed on my Yamaha Expansio Manager. One of them I use to make my personal packs (PPI), which I use in my presentations and I have another one that I use just for testing. The n27 for personal use I already left configured with all the selections I made in each pack, I use over 30 packs, some of which I don't use the whole pack completely, so I select only a few files of voices or styles that I'm interested in. The second n27, I use it only for testing. For example, I want to test a new pack, either from Yamaha or from third parties, so I just select that pack, on the second n27 (which is not my keyboard) and the installation is much faster, as I am not going to touch the settings of the my daily use pack.
It would be very time consuming and complicated if each new pack installed in YEM, I needed to keep installing and uninstalling everything all the time.
So I use an extra n27, which I got from another SX900, just to make new packs known, because the installation is faster, and to know if there is something of interest to me. If any style or voice files interest me, I go to my main n27, and select the whole pack or just what interests me.
So, to answer your question: yes, PPI can be used on any standalone keyboard on n27. The CPI does not, it will only install for the n27 of origin.
Hope you understand!
Hug to everyone!
Enildo