Ive made the interior i saved it as DDS and have the DDS plugin for photoshop but it wont load ingame it says " Can't load ( File Name ) "

Saved the attachment as Jpg so you can see.

Converted to DDS for you in Paint Shop Pro.

isn't it the wrong resolution (1024???) or will lfs read this file no mather what the reso... (just like the skins)

Yeah you can have high quality textures by increasing their size like we do with skins. As long as the proportions stay the same (square), it will be fine. Going too high with texture resolution decreases performance, as it does with high-quality skins too.