Supported packages?

[Roland Baudin]

Hello everybody,

I am a new LyX user and I have a question : is there a list of LaTeX
packages/classes  that are supported by LyX? Indeed, I have tried to
install a package written by a friend of mine (a slide class) and the
new class is not seen by LyX, even if I try to 'configure' LyX again...
Thank you for your answer,
Roland Baudin