Does anyone know how weighting is handled in the Central feature tool? (Spatial Statistics) I am trying to replicate the tool and I am able to do it fine unweighted but cannot replicate using feature weights. This is using a weight field (population). 'Self potential weights were left blank. Is an origin weight used? Or is it a combination of origin & destination population? Any help is appreciated.

ArcGIS 10 service pack 3.