.dds files

just needing some basic help with these dds.
so here's the miniature:
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and the image loaded to photoshop:
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I just need some help making the loaded image keeping the black(empty) backgound
I would apreciate if somebody could give me a hand

... ok i tried this before but my actual background doesnt turn blue like it happens in irfanveiw but even if its black after u edited it on mine it shows the black... lawl