Magento

How can I programmatically add products, both configurable and simple?  There will be images too and I don’t know exactly where to put them.  The directory structure for images is quite unusual.

Thanks much!

I’m going to need to be doing this as well, to import a clients existing product database, so some documentation regarding this would be very helpful.

try this
http://www.magentocommerce.com/boards/viewthread/4694/P15/

The api is what i use
http://www.magentocommerce.com/support/magento_core_api

Another link:
http://www.magentocommerce.com/boards/viewthread/46844/