Two versions of the Azenis Xsplash screens. One with the Ubuntu Logo, the other without. To install unpack the archive and then open the directory containing the theme you wish to use.
Use the command sudo nautilus /usr/share/images/xsplash.
Copy all the files from the theme directory to the xsplash directory (Hint: use middle mouse button) then restart to see your new xsplash startup.