Have you put them on yet? I read a post on another board where a guy described the radiator swinging out. I don't remember where it was though. I also read one where someone said all you need to do in order to instal the muzzy fan is remove the electric moter. Access is supose to be pretty easy. The bracket holding the fan on is secured with three bolts, one on bottom and two on top. One of the top bolts might be difficult to get at. It is real easy to access if you take the tank and air filter housing off. My bike is apart right now because I am looking for the spark plugs.
The bar that the radiator is attached to, the one the fairings bolt too, could be removed with two bolts. That should allow the radiator's lower half to swing forward. That might give you the room you need to get at that third bolt holding the fan on.
I would like to hear how it went for ya. I have been thinking about the muzzy fan too. Does it come with a toggle switch to activate the fan manually? Is the entire fan replaced or just the blades?
Good luck