There is no driver for DAQPads under Unix/Linux.
Besides the Comedi driver, there is the Measurement Hardware Driver Development Kit (DDK) which provides the tools to develop a driver. Unfortunately, neither the Comedi driver or the DDK supports DAQPads.
Measurement Hardware Driver Development Kit Frequently Asked Questions
http://digital.ni.com/public.nsf/websearch/2D93070A3DDEFD7186256C59007289E6?OpenDocument#7
Measurement Hardware Driver Development Kit (DDK)
http://sine.ni.com/apps/we/nioc.vp?cid=11737〈=US
Regards,
Todd D.