Meaning, that S3PE wouldn't preview the images but opening them up in a graphics editor also didn't do the job. No one seemingly had made a snow mod or replacement mod in that regard which made me more curious as to why! When I went in checking the textures, I noticed they were 'Uncompressed'.
Now, I started this project entirely by accident. Some of you might have followed the 'making' of this, but it's finally here! No more blinding snow textures or icicles, and more frost! Whee!