Something else which helps tremendously is to add a marble filter at the very edge of visibility. Pick a colour slightly darker than your skin tone for the veins, and one slightly lighter for the base. Then, play around with the marble settings until you get something that covers the whole body in a realistic "vein like" manner. Use the different blending modes (I use Photoshop but I assume PSP has something similar) and opaacity until you get something you're happy with. You can also selectively erase parts (or partially erase with a non-opaque eraser) to add more realism.

Coppula eam se non posit acceptera jocularum.

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