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Check out the wiki (http://www.magentocommerce.com/wiki/). There is a section “Recommended Articles for developers”. There are two or three articles that should get you started. Otherwise post in the forums with more specifics and we’ll all help each other figure it out. I’ve been working on a shipping module, but I’ve got a snag in getting it to show up in the front end. The tutorial was spot on up to that point though. Like I said the wikis have a bunch of good info and are probably the best place to start. After that searches on the forums can glean you some gold. After that a specific question posted out here seems to have a better chance of attracting someone to answer it than a genral statement.