Nostalrius Begins - Quality wow vanilla realm (1.12)

So I'm trying to get a picture without "backgroound" with DART ...
I guess I need to put said background in either black or white and then use a blendoing mode inside the addon. Or something like that.
So I've tried a black background and the ADD blend mode. It worked, but my image have like a lower than 100% opacity and the colours are a bit fucked up.

So my question would be:
-What blend mode can I use in photoshop to preview the ingame result so I can adjust the colours a bit?
-I managed to get the colours a bit better but I didn't find a way to change that "low opacity feel". How could I fix that?
-Do you know if another addon blend mode would give me better results?
-Generally any tip is welcomed

The settings with 99% opacity should work with this.

Go to ''Channels'' and you should see ALPHA channel for the texture you want to edit like this:

http://i.imgur.com/gPoRNIE.png

You need to cut/delete away at EXACT shit you want to be seen like this:

http://i.imgur.com/mZ6yVk1.png

So you are actually cutting on this alpha channel and anything red is NOT shown but anything that has the cut is shown:

http://i.imgur.com/rBXAfg6.png

Awesome thanks!

I have another little question.
In DUF, is it possible to modify the source used for the "Use class texture for portrait"?
Basicly I'd like to create a texture for each class, and use it as a portrait.

Also, would you have any link/tutorial explaining how could the "scripts" be used in DART? I'm very curious about that, if you can interract with the textures, it can be interesting.