Download the PSD
First I duplicated the forehead and moved it up. Actually, I duplicated it twice, but duplicating once then stretching it a bit would have worked too. I masked that onto the appropriate area.
Then the next two layers are from the Handyman Method, to make the light and colour correct.
Then a final layer for a bit more cloning, to take care of the last wisps.
For the red pants, a Hue/Saturation layer, choose Reds, and lower the Lightness slider all the way to -100.
For the rest, I don't have any tricks, sorry. Just painstaking cloning.
What colour would you like? It would need to be another light colour.
This would be ideal if we could pull it off, but we'd have to be EXTRAORDINARY lucky to find another photo at exactly the correct angle, lighting, depth of field, size, etc.
No, if you look at the image sizes again, you'll see they're exactly the same.
Exactly the same pixel dimensions, that is. And that's the only thing that matters.
So the answer is: either method is fine. They both give the right result.
By "stripping out the profile" they mean to uncheck the profile box in the Save As dialog when you're saving the file.
I don't know what to tell you, sorry. This is just down to luck, it seems.