Tried, opening these .pak files but they are either encrypted or contain files that aren't visible with external extractors. I tried it with the .xen extension and with removing the .xen extension still the same results.
http://www.mediafire.com/file/102682l2f ... ds.pak.xen
http://www.mediafire.com/file/82nkij22o ... em.pak.xen
http://www.mediafire.com/file/fdv6dpl6a ... id.pak.xen