Chasey489
Powder 4? Powder.h is the file you should be looking for...Look if you have windows change the view to tiles. It should be the one titled "powder" with a piece of paper with and H on it for the symbol.

Chasey489
In what sense? Here is the coding tutorial
Find #define PT_NUM 53 in powder.h
When adding an element, place it before PT_NUM. Give it the number PT_NUM had previously and add one to PT_NUM's number. The elements should still increment by one.
Other than that it's copying what you see above and changing the numbers.