http://www.semp.us/images/Biot584PhotoG.bmp
This is a more detailed map of the overlapping mixes of ethnic groups in Northern Pakistan and Afghanistan, with Pukthuns clearly in the majority on both sides of this map.
Enlarge the map to see it better, maybe 11 different tribes, including Pukthuns, plus "others" catch all category.
Am doing more research to see if I can break down Pukhtuns into subtribes as you suggested.
http://pukhtunwomen.org/node/161
This PukhtunWomen website article uses 2007 US Army Manual info which does a very good job of breaking down into subtribes, etc. the Pukthuns in both Pakistan and Afghanistan.
http://en.wikipedia.org/wiki/Pashtun_Tribes
I will try to find mapping which overlays these many, many tribes, subtribes, but finding such a map may take more than tonight's Internet scan.
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