I cannot say I am familiar with the method you used.

I take it you found that option in the UV window, Polygons -> Flip UVs -> Options, and then opened the camera tab?

Well, if it worked, it worked ^_^

But yes, under Polygons -> Flip UVs -> Options, you can also choose horizontal or vertical flipping; that will essentially have the same effect as scaling (but has percision :p )