p.map and vector cats

[Nancy Greeley]

is there a mechanism in p.map, 4.0 or 4.1, for outputting different
vector categories in individual colors on one map?  For example, so
that cat 1 vectors are red, cat 2 vectors are blue, and cat 3 vectors
are green...

(i know i could get different colors by having each category in 
a separate vector file.)

Thanks much.
-Nancy