In the users guide, which you can find in the file doc/beameruserguide.pdf,
you will find a detailed explanation on how to install the beamer class.
- The LyX documentation is part of the users guide doc/beameruserguide.pdf. It
- also explains how to install the LyX-related files.
There is a file emacs/beamer.el that adds some beamer stuff to emacs' AucTeX