[GRASSLIST:4760] Combining Rasters: Howto? Use area vectors?

[Chavoux Luyt]

Hi

I've been looking through the manuals, but couldn't find something that 
does exactly what I want (or maybe looked in the wrong places?).
I have points (vector-> raster) with buffers around it. Is there a way 
to have the buffer labeled by the point nearest to it? I.e. instead of just
giving the distance from a point, actually saying from where?

Assuming I can get the above done (by hand if nothing else works). I 
have now a number of areas each with its own label. I overlay this map
with another area map so that Area A from map1 may overlay Area a, b, 
and c from map2. Also Area c (map2) may overlay Area D and E
in map1 as well. I want a map of these intersections, but labeled by a 
combination of map1 and map2... Area Aa, Area Ab, Area Ac, Area Dc, 
AreaEc etc.
Is this possible? I though to use r.mapcalc, but couldn't find a way so 
far.
Is it possible to do something like r.mapcalc '@map1_2 = @map1+ at map2'  ? 
(with "+" being like concat acting on text). Altenatively I might have 
to export my raster maps to vector format and do it there (if it is 
possible).

A pointer to the right manual or tutorial will be highly appreciated!

Thanks!
Chavoux