OS before 8.5

Smile uses Navigation Services and Appearance. If your machine is running MacOS 8.1, install Navigation Services by copying the file Navigation into your extensions folder. You should not need to restart. If your machine is running MacOS 7.6, install Navigation Services and Appearace by copying the files Navigation and Appearance Extension, into your extensions folder, and the file Appearance into your control panels folder.
These files can be found on the Satimage softwares home page :
wwwusers.imaginet.fr/~satimage