Instead of using Inkscape to draw gearwheels, you can use this project. In Scratch 1.4 you can make a screenshot with the "grab screen region" tool. Turbo mode is recommended. (Shift+Green Flag)
I have changed the drawing system slightly and made it so the gears can be as big as the screen can fit, it also draws the gear when you change the size. I also changed the colour scheme.