Thanks for the link!
Looks easy enough...BUT...I extract gallery-1.4-RC1.gz to gallery-1.4-RC1; it doesn't install files and a gallery directory as outlined below.
3.1 Unpack gallery download file:
Click on the File Manager link
Click on the folder icon next to public_html directory
Scroll and locate the file (gallery-x.x.x.tar.gz) that you just uploaded, and click on the name of the file (not the icon)
Appearing on the right side of your browser screen will be a list of options. Click on the Extract File Contents option.
A new browser window will display, listing all the files that were just unpacked and installed. All the files are stored in a newly named subdirectory called gallery. Go ahead and close this browser window, returning you to the File Manager window
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the resulting file gallery-1.4-RC1 seems be a tarred file. I use file manager to extract that but nothing results. Are there updated instructions somewhere?