Hello
re /opt/navigation.htm
navigation.htm is provided by the relevant support rpm (either smesailenv, el5sailenv). It is different for each platform and has different line entries. It is not present in the sail rpm.
re tooltips
A tooltip has to be referenced by code so if you were to create a tooltip then you would need to develop new code to use it, which is fine if you want to develop the product but most users don't. On the other hand, you can change an existing tooltip (perhaps to enhance it or change the language) and such changes will persist across releases.
Kind Regards
S