When I create a new part, I make it completely outside of FZ. I will save the four .svg files and the .fzp in a folder with the name of the part and zip them all up into a .fzpz then import it into Fritzing.
Sometime I will create a generic connector in FZ with the number of pins and spacing I want. export it into the folder with the part name and extract the files... This will give me a starting point for the .fzp. I then import whatever .svg's I need into CorelDraw with all of the pins/pads pre-labeled. The only problem is that the connector pcb.svg is in a vertical line. If I rotate it 90 deg. to make it horizontal all of the circles will be rotated causing those little red dots. Then I have to go back and un-rotate each circle individually.