Questions on WMI

I am using the MSRndis driver. I know how to get the connection status from the RNDIS driver using WMI. But now I have to use OID_GEN_RNDIS_CONFIG_PARAMETER to set device-specific parameter. Then I have to use WMI to get/set the device-specific property from an application. I have understood that there is a clear mapping between GUID and OID which are internally mapped to WMI class.

Now my questions are:
* How to add new device-specific parameter so that the application can set/get this parameter using WMI?.

* How to add this new property into the MOF file?

* Is there any GUID for OID_GEN_RNDIS_CONFIG_PARAMETER?

* Is there any WMI class associates with OID_GEN_RNDIS_CONFIG_PARAMETER?

* Which .mof file should I use to add the new device-specific parameter? If I have to create a new .mof file for that, then how to register that mof database to WMI?

Please provide some details about how to use OID_GEN_RNDIS_CONFIG_PARAMETER to get/set device-specifice parameter.