Deegan,
It is not clear (to me at least) if your question is 'How does my friend register the aircraft for the rest of 2009 so we can fly it around the US before we export it to my friends own country and re-register it on the local register'
Or
'How does my friend (a non-US citizen) register and operate an N-reg aircraft which he intends to keep permanently on the N-Reg, based outside the US'
The second question is very standard, there are companies that specialise in this and are much more economical than indicated in your post.
The first one is a little trickier. In particular you will need to consider if any registration structure impairs your ability to get insurance (i.e. ownership by a non-pilot friend may not work).
With regard to the general process of having a 'US Friend' own the aircraft, they really are the owner with all of the rights, privileges, and risks associated with it. Unless you are reasonably careful in drafting an agreement, you have issues if they decide to walk off with the plane, if they die, and I have heard of the US taking a view in some cases that this is not a legal registration (I believe this involved a non-pilot 'owning' an aircraft, but clearly having nothing to do with its operation, maintenance, management, etc.)