Prometheus Project Resources
Religion
The following link has numerous articles on creating more realistic religions for RPG's.
http://www.rpg.net/columns/list-column.phtml?colname=clerical
Plants
The following link has numerous articles on the use of plants, including an article on spices and trading
http://www.rpg.net/columns/list-column.phtml?colname=vegetative
Creating drawings of figures
I'm not that artisticly inclined and I have a lot of trouble drawing the human body. So what I do is insert one of the following body outline drawings into a text editor that can set the image as a watermark. I then print out the page and draw over the picture then scan the picture back onto the computer. A little more work with a paint program and I have a reasonably acceptable product.