R help - Jul 2011 - negative binomial regression with spatial weights matrix (not locations)

Hello, 
I have some data that exhibits a negative binomial distribution and also
spatial structure. I would like to create a model that accounts for both.
However, instead of locations, I have a distance matrix (cost matrix)
describing the spatial relationships among the locations. I have tried using
various methods (spBayes,geoRglm,geoR), but none incorporate both a negative
binomial distribution and distance matrix. Many methods use the geodata
object, which uses coordinates. 

Please provide suggestions as to what approach I can use to analyze this
data. 

Thank you!!

Christy M. 

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