extract the .jpg skin file into your lfs\data\skins.
extract the .dds files into your lfs\data\dds.
Make sure to backup your dds folder before you do this in case you want to change it back to the original. As the new .dds files will overwrite your existing fxr interior.
Someone I made a skin for had a similar issue to this, he had his card to set to performance in ccc, he changed it to quality and it solved the problem.
If it helps Zay I've attached a .psd of a basic uf1 skin (couple of stripes and logos) with a couple of layers set up, feel free to download it and have a look, edit it etc.
Click the attachment of the skin so it opens into another tab, right click on the skin and click "save as" and save it in your LFS\DATA\SKINS folder. Do not change the file name.
As Silver said make sure you keep your layers in the right order, if you need to lift or lower a layer up or down the list just click and hold it then drag it up or down.
Then either leave them as thumbnails or put them in a .zip or .rar and post some smaller preview of what each kit is. It is almost impossible to make out which one is which, let alone what the differences are between them.