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Can I download my CS Cart DB and Upload to Magento seemless?
Robert, there is not a single solution which does what you are asking for. I use cs-cart my self and im am just in the stage where I have to go in and mess around with the product export file (taken from cs-cart) to import it in magento.
If you need help on how to do that, just PM me, ill help you around. :-D
Suggest you to take a look at Cart2Cart - shopping cart migration service. With help of Cart2Cart you will be able to migrate all your database from CS-Cart to Magento or any other popular shopping cart automatically.