I know they're just sketch lines but someone will have a use for these! Just bring them into a program like photoshop or SAI and make the lines or the color layers you use to color this transparent by making the layer a 'multiply' layer and it will work fine. Sorry but this is not mspaint friendly.
Free to use, just link back to here!
Do NOT use in any way to get real money. Fake money is okay.
Also, I'd love to see what you do with it! Post here if you use this and feel like showing off.