@ESP, good method for text, with some modification for an image it should work.

@Fire9Anime, sorry RW commitments have eaten up my time... i think the modification for an image rather than text would be to isolate a copy of the element you want to "flame" and make it on it's own layer. Then adjust the image to "Desaturate" (remove the colour, adjusting the contrast for stronger black and whites) the rest should work well. Erase the "non"flamed part on the layer to allow the underlying original element to show through.

haven't tried it yet to ensure it would work but this gives you a "jump-off" point.

:)
retrocity