Style LaTex-LyX problem

[Fabio Scardigli]

Dear Sirs,

I have the LyX version 1.0.4 (downloaded from your Primary LyX Site).
I have also LaTex 2.09 (or LaTex 2e).

I would like to use the style file "espcrc2.sty" within LyX.

How can I do? 
How can I add this particular style to those (for example AMS) that LyX already 
has by default? 
In other words, how can I write by using LyX AND the style "espcrc2.sty" ?

Thank you very much for the answer and for any hint or suggestion.

Fabio Scardigli