I've been using the following lines for 9x, NT/2k for the Norton GRC.DAT file

code:
 	If @inwin=1
If Exist ("C:\Documents and Settings\All Users\Application Data\Symantec\Norton AntiVirus Corporate Edition\7.5")
Shell '%COMSPEC% /C XCOPY "\\BETHESDA\Apps$\NAV\GRC.DAT" "C:\Documents and Settings\All Users\Application Data\Symantec\Norton AntiVirus Corporate Edition\7.5" /D /H /I /R /Y > NUL'
EndIf
Else
If Exist ("C:\Program Files\Norton AntiVirus\")
Shell '%COMSPEC% /C XCOPY "\\BETHESDA\Apps$\NAV\GRC.DAT" "C:\Program Files\Norton AntiVirus\" /D /H /I /R /Y > NUL'
EndIf
EndIf