ok...
As this forum seems to be full of cisco proffesionals its a bit sad that they do not have the time to answer questions that seem to be beneath them .. trivial to them but important to us that do not know.
So i have the answer and will post it for those who need to know it should they have a similar problem...
en > conf t> int XX > mac-address 0000.0000.0000
xx being the interface you need to change it on
> being enter
0000 being your mac in groups of 4 separated with a stop.
Hope this helps you.
thanks