I've been successfully using 'r.watershed' to create the aspect map for
the 'r.water.outlet' catchment program. However I've just been asked by
someone in Hydrology to derive a large catchment. The problem is that the
SPARC I'm using has so far being running for 24 solid and only managed 21%
Is there any program which generates just the aspect map necessary for
'r.water.outlet' - hopefully quicker 
Thanks for any info.
Steve Culshaw
NRA North West
e-mail : nra@cix.compulink.co.uk (use this for general usage)
or sculshaw@cix.compulink.co.uk (Private - only checked at best
biweekly)