You can take a screen shot of the pieces and open them in Photoshop. You'll probably have to do some scaling to the screen shots to get them to the right size. The amount of scaling will most likely depend on you computer, monitor, etc. I'm on a 13" Late 2011 MacBook Pro (non retina) and scaling a system captured screen shot to about 109% is pretty close to actual size.
I however have been doing all my concepting and schematics in Illustrator. I find it much better for precise drawing etc. If you have Creative Cloud you can look to adding Illustrator to your subscription.
If i can get around to it, I'll draw up all the pieces and save them out as jpegs for people to fiddle with. No promises though
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