1st step: Download and save .zip (zipped folder) file.
2nd step: Right click, Extract All...
3rd step: Once extracted right click and copy the file folder.
4th step: On the left of the window, click Local Disk (C:), If this bit on the side does not come up, right click and enable it. UNLESS however you had saved it to somewhere else in the installation progress, then go there in stead.
5th step: Click Program Files (86x)
6th step: Click Stardock
7th step: Click ObjectDock Free
8th step: Click Backgrounds
9th step: Click either Tiles OR Zoomers
10th step: Right click, paste.
11th step: Close the window
12th step: Right click on your ObjectDock
13th step: Either: i) Click Settings...
ii) Or if comes up with a popup menu (with arrow), mouse over and click Settings...
14th step: Click Appearance
15th step: Click Change Background
16th step: It should be there, you can now select it.