How to get Hardware Key for ABAP WAS Sneak Preview licensing?

I try to register for Licensing Procedure for the Mini SAP System in http://www.sap.com/platform/netweaver/minisap.epx website, but I don't know how do I get the hardware key to complete the registration.

The remarks indicate that to get it, I need to execute saplicense.exe -get. Where to I do so?

Thanks for advise.

Kent