there is a patch for driver studio 2.7 ,3.0 , 3.0beta & 3.1 that fix the problems with win xp sp1 & sp2
Link for softice:
ftp://ftp.compuware.com/pub/driverstudio/outgoing/OsInfo/OSINFO.DAT
for visual softice:
ftp://ftp.compuware.com/pub/driverstudio/outgoing/patch/VSISP2Update.zip
and symbols:
http://www.microsoft.com/whdc/devtools/debugging/symbolpkg
i use these links and fix my problems