Tech Net + Office 2010 keys [ I've run out ] - moving a key to another PC

[mattx]

Does anyone know how I can go about un-installing a copy of Office 2010 from one of my test PCs and onto another PC and use that key ?

I've used all my Office 2010 keys and need to do some more testing on another device. Is there a way I can de-register a key and then move it on to another PC ?

I've looked at the tech net FAQ on keys but it does not shed any light on this [ surprisingly ] Unless as I blind berk I've missed it.

Anyone ?