PhotoVcarve with Shapeoko 3

Sir,
Being a newbie in CNC and informatics, I could not find, what I was looking for in the two addresses you gave me. Wether you take my hand and guide me to the exact line of the post processor or tell me if there is an alternative to PhotoVCarve.

Regards,
Jean Boulanger

N.B. Being French, I may not catch all the subtilities of the English language