Maryann,
Can you let us know what version of JomSocial you're using, what files aren't there, and what tag or button your trying to load into JomSocial? That will help us make sure we give you the right answer for what you need to do.
As far as I know, the documentation for integration with JomSocial is up-to-date for all 2.x versions. If you're using something in the 1.x range, that would explain things, but we may also have missed some changes in a recent release from JomSocial.
Just let us know and we'll help how we can!
Thanks,
Alex