[R] R commands formating for LaTeX

[Rado Bonk]

Dear R users,

I have to include typical UNIX formated R commands and outputs into the 
article using LaTeX.

What is the easiest way to include R prompt commands and text outputs 
(including messages) into LaTeX documents? Is there any template or library?

So far I'm trying to produce R commands in LaTeX using LaTeX general 
format options.

Thanks,

Rado