Now are you asking about cooking up some oil or are you asking how to make cooking oil ?
I can help with both.

btw harddon has provided a great tutorial on alcohol extraction for smoking oil. If you want to use alcohol extraction then use his tutorial and you wont go wrong. (link above) but alcohol, while the traditional method, extracts many undesireable materials from the weed. Butane will extract the resins and not the waxes, chlorophil etc that alcohol does. In short, it makes a purer honey. Totally different product than iso extraction.