Extra Gifts

Hello : I have been told to "install the contribution? It doesn’t come with osCommerce, you have to download the contribution and install it to your store." I just have no idea where to go to do that. I need this option for shipping from multiple locations. Please advise. I am new to this, so be patient. Thank you.

HELP!!!!! Can anyone tell me...... I am using several different vendors on my website. How can I calculate shipping and handling. For example I use vendors from California, Georgia, Minnesota, New York, etc. If you live in California and the item you purchase is coming from California the shipping issue should allow for the charges to be calculated from California. But if you order 1 item from California and 3 items from Georgia and 2 from New York, I can't very well charge what it would cost from California because I would lose out on the cost of the product coming from Georgia and New York which would be further. Is there any solution to this. I don't want to over charge on the product to compensate for the shipping and handling. Please anyone who has a solution, send ASAP. Thanks to all. Sheryl