Making a metabolic map with just some pathways is no an easy task. With all the metabolic pathways, it is significantly worse. The link that I leave in this post lets you see the most complete metabolic map that I know. It is worthwhile to see him, even if only to have biochemical nightmares in the following night... :)
http://www.expasy.ch/cgi-bin/show_thumbnails.pl
You can download the whole map in a single file here (cortesy of Dr. Ramazan):
http://uploading.com/files/f839m5b9/biochemistry.swf
