I was on vacation for a while before I could read your message.
If you still have the issue open, this might help you
For the drivers, freescale confirmed me that the flash drivers are different for XE family as the flash technology and composition is different.
I am not sure if the SSD drivers for XE family have already been loaded in their product pages.
I suggest you to raise a technical request to freescale asking for the XE family SSD drivers, that is how I did and the drivers are working well for MC9S12xEP100.