Place the .jxs files in Photoshop Presets\Scripts Folder
Drop the .atn file and .asl files onto Photoshop the load the actions and Layer styles
Unzip CollageTemplates.zip into "C:\Program Files\Adobe\Adobe Photoshop Templates" or any folder you want to keep your collage templates in.
You will see the scripts listed in Photoshop menu File>Scripts>script name