lyx file -> SGML/XML files

[Adolfo Pachón]

I'm new in tex,latex,lyx,SGML and XML. I know the linuxdoc-sgml tools,
and I'd like to know this:

1. It's possible to modify the linuxdoc class for creating my own
specific class? How?
2. Id like more class layouts for my lyx users (my own stylesheets). I
need Latex, Tex, another?
3. Can I extend the linuxdoc class to incorporate graphics?

Thanks

PD: sorry for my poor english