Hiding IP for blackhat adwords campaigns

Hi how can one hide his IP if he wants to use more than one adwords account?

And what is the best way to go if I want to advertise my (social fan) service related website?

For me it is the first time I want to go blackhat on my enemy G. So any inside would be great.

Going to steal back what it stole from me, go Robin Hood on the big G.

To hide your IP try hidemyassDOTcom and of course, always clear your cookies between sessions.

clear my cookies, how to do this in firefox, sorry but I am a nebie at this stuff

In firefox:

CTRL + SHIFT + DELETE

Then delete cookie + cache from the begining ( better be safe than sorry)