They are mod specific program covers for the championship tracks and some mod specific track files for Kyalami and Brands67. Also mod specific .lp files for Cleremont and Montjuich.
If you already had 69mod before you installed 69-Xtra then you most likely have these files.
For those that do not have them I have attached here.
Edited by paul skingley, Apr 04 2012 - 03:58 PM.