Is it possible to configure LyX so that I can create a literate article, book or report with either the "standard" LyX/NoWeb settings or the Sweave/R settings? I've spent a few hours trying to figure out how to doit, but everything I've tried only gives me one of the two options.
You want to mix Noweb and Sweave in the same file? No way, since the literate layout files (see http://cran.r-project.org/contrib/extra/lyx/) were modified for Sweave. You can also not use Noweb in one file and Sweave in another file without changing the literate layouts and preferences file.