Two questions about delivered applications

I'm delivering an application using LispWorks for Macintosh and have 
two questions that I've been unable to solve.

First, if I start my application by double-clicking on a document 
that belongs to the application, how do I get the pathname of the 
document?  (On Windows, the pathname would be passed as a command 
line argument but that's not how it's done for Mac OS X GUI 
applications.)

Second, LispWorks kindly provides the application with an application 
menu with working implementations of Hide, Hide Others, Show All, and 
Quit.  I've been unable to find that menu anywhere obvious so I can 
add an About menu and Preferences menu to it.  Any thoughts?

Thanks,

   - Gary