add a thesis class

Hi to all... I'm looking for a Lyx layout to start writing my PhD thesis I'm new about Lyx, so I didn't understand very well how to add a layout (like a PhD thesis layout :-)) to Lyx. there's someone can give me these informations I'm using a redhat 7.3 S.O. and the 1.1.6 version

What's the real name??

Hi to all. I would whant to know if I have to pronunce the name Lyx like Latex ("Latec") or simply like: "Lycs".. thank you very much!!! Bye Ivan