Yes i agree with jon. Such functionality is not included in WinDbg. But as he said if you are up with driver development or writing your own debugger extension which is btw not that difficult.
I can give you the advise to read in the www.sysinternals.com forum to get more information about the topic. www.codeguru.com/forum is also a good place to ask such things.
good luck ric
regards
PAPiLLiON aka OHPen aka PiTcH_SiLoW