** It just kinda spreads odors, it doesn't remove them. **
Range hoods that do not vent to the outdoors but instead just recirculate the air usually filter it through an activated charcoal filter. If yours is not going an adequate job, maybe the charcoal filter just needs changing. When was the last time you replaced it?
** I don't want to extend a vent to the attic **
It shouldn't be vented into the attic regardless. It should be vented directly to the outdoors, whether through a wall or through the roof.
You can see a couple of duct free range hoods at the following link:
LINK > Ductless Range Hoods
The Appliance Information Site
[This message has been edited by DanO (edited March 07, 2003).]