I'll take a look but the problem is the compression.
Wings wants to unify it's texture format so it's easier to handle i.e. switch what is up and down, make them power of 2, remove row-alignment and so on.
To do stuff like that we need the raw (decompressed) image, which means I'll have to implement the decompression which is not always trivial (jpeg cough), and that part was patented until to 2018.