Vista stealth modding.. Anyone try it?

I was wondering if anyone has tried this feature yet? Also, Is this part of vista's normal function or is there something that needs to be done for this to work properly?

For those of you that don't know what I'm referring to ...
Stealth modding allows users to change or upgrade base hardware such as motherboard, processor, RAM etc. without requiring a Windows reinstallation or causing blue-screen errors.

sounds interesting. is there a set number of times this can be done?

I don't believe so .. I believe it is a change in how the OS stores info on the base hardware. I can't seem to find any articles on exactly how this works though.