It is possible that FS put script definitions in default.jsd that are not in default.jss. Default.jss does include several "use" statements that include code from other libraries. Also, the psd d files are used for the command to insert a function in code, and for the verification that parameters are correctly listed for functions.
There is a JAWS scripting list on freelists. This list has most of the professional scripters on it, so they get impatient if people ask fairly simple questions. Also, if you ask can I get a script for Application X, nobody will answer.
Please try to search the archive of over 10 years of scripting history before asking a question.
Best of luck!