F1 2019 Decal problem

F1 2019 The Game (Codemasters)
Hello, I want to dosome personalized liveries, but I have problems with the decal. The game requires DXT5 SRGB,but I can only do DXT5 ARGB with photoshop 7.0 and the NVIDIA plug-in, so my game crashes or the car doesn't look well. Is there any way to solve it?
Thanks
 
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