Editor parts pin distance at pcb

Hello , i want create a relay with different pin size as in the core parts. Here in Germany we use relay with 5mm pin distance.
My problem is how i can adjust the right distance of the pins for the pcb .
Where i have to adjust the right size of part and pins distance at inkscape or at Fritzing part editor?

I work with Inkscape and i already found the xml file for svg.

If you want to alter the part drawing to make a new part, you use Ink.
If you want to patch up a work around, you just place via on the PCB at the correct spacing.