Pam, if you feel it necessary to remind people that Lois is in disguise with the different hair color, it works fine. It's about what I'd pictured, except I saw Clark pointing it out: "And adding glasses and coloring her hair as a disguise." And then Lois would mention that the changes would have been made to escape the notice of whomever was chasing her (the same reason she stayed in Europe under an assumed name).
But that's the same information you put in, so I think your version works fine, and since it's in the explanation part of the vignette, it isn't too blatant.
