How do I check the version of Microsoft Internet Explorer using SMS

Hi
I'm trying to find out the versions of Internet Explorer across our site using SMS 2003. I've tried editing the sms_def.mof file to include the MicrosoftIE class. I've added the following onto the end of the file

// START - IE Summary

#pragma namespace ("\\\\.\\root\\cimv2\\SMS")

[ SMS_Report (TRUE),
SMS_Group_Name ("Microsoft IE Summary"),
SMS_Class_ID ("MICROSOFT|IE_SUMMARY|1.0"),
Namespace("\\\\\\\\.\\\\root\\\\CIMV2\\\\Applications\\\\MicrosoftIE")]

class MicrosoftIE_Summary :

SMS_Class_Template
{
[SMS_Report (TRUE) ]
string Build;
[SMS_Report (TRUE) ]
string IEAKInstall;
[SMS_Report (TRUE) ]
uint32 CipherStrength;
[SMS_Report (TRUE) ]
string Version;
};

// END - IE Summary

I'm expecting to see MicrosoftIE under the Hardware Inventory but nothing has appeared. Can anyone suggest anything I might have missed or any other methods of doingt this??

Thanks