Ah yes, the UEP ones integrate your improvements.
Are you sure they are the old Pre-UEP ones though? I believe I did pull them out of the correct folder.
They will unbalance gameplay in dark maps
That's not an issue. If a map is dark enough to be of concern to people, they will simply turn lighting off anyways. I've made some night maps in my time, and I have never ever used 'true' darkness to obscure things -- it seems better to simply darken the terrain and use a dark sky color to make it appear night -- perhaps blending it with a little bit of sky darkening to make it more believable.