Displaying labels for r.contoured contours?

Hi,

I've being generating rainfall maps using s.surf.tps and the corresponding
isohyets using r.contour.

Now, I want to be able to automatically label the isohyets with their
respective rainfall values. Is there a way to do this under GRASS - or at least,
a way to make it easier than hand-labelling them? N.B: I notice that you can
get the labels displayed by v.digit but thats not much use in the bigger picture
of things.

Thanks in advance once more,

Fred Watson
PhD scholar
Civ. & Env. Eng.
Melb. Univ.
AUSTRALIA