Your post was not forgotten. Our reply policy is 1 to 2 business days. 3/12 was Friday. We are not available on the weekends. I'm sorry I was not able to get to your post on friday, but I can address your questions today.
the marketing is correct, you do not need to have any database knowledge to use eCart when you are creating a static cart. In your case however, with 400 items, you would need to add 400 add to cart buttons.
If you do not wish to learn anything about databases, than this will be your best bet, create a static add to cart button for each product you wish to sell.
This is a rather tedious task however, and can be simplified by creating a database. the real question is:
Do you wish to embark on the tedium of creating 400 add to cart buttons, or learn to use a data base.
Are you crating this database locally? if so, a good tool to use is SQLPro
it is a fairly easy to use GUI tool that will allow you to enter information directly to your db.
as for the error you are getting, I would need to see the .csv file you are using top trouble shoot.