I'm not familiar with PSP. Here's what I'd do in photoshop. Load your texture. Load my nostrils. Rescale my nostrils to match your texture. Copy the nostrils. Paste as new layer into the texture. Set the layer blending mode to "Multiply". Adjust the opacity of the multiply layer to suit your taste. Flatten the image. Save the resulting modified texture in a new file. Use that file in your render.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)