biblatex > two bibliographies

[Wolfgang Engelmann]

I haven't found a reasonable info to set up two (or more) bibliographies 
under biblatex.
I would like to divide the bibliography in one part for normal reference 
stuff, and one part for a few references which are recommended for 
further readings.
The lyx menu for multiple bibliographies allows it
per partition, chapter, section, subsection, and child document,
but I would like to have it in the one bibliography with different 
headings (colour?) or in two bibliographies following each other 
directly and corresponding heading(s).
Could somebody tell me where to find infos for it?
Wolfgang