Hi,
Like the other posters I found the same zip files corrupted!
1000_Abstract_Space_Backgrounds_Part_21.zip: The archive is corrupt
1000_Abstract_Space_Backgrounds_Part_25.zip: The archive is corrupt
1000_Abstract_Space_Backgrounds_Part_26.zip: The archive is corrupt
1000_Abstract_Space_Backgrounds_Part_28.zip: The archive is corrupt
1000_Abstract_Space_Backgrounds_Part_29.zip: The archive is corrupt
1000_Abstract_Space_Backgrounds_Part_31.zip: The archive is corrupt
1000_Abstract_Space_Backgrounds_Part_8.zip: The archive is corrupt
Please replace the bad files.