I found the plugin and template for mass importing items into eStore. It works just like you described. I actually added onto the template to include the rest of the fields (columns) that were not there - so now I can set everything.
I have one problem though that, for me, makes using this process almost worthless. I need each product in my system to be assigned to a category. But since this is not handled via a field in this table, I cannot set it using this mass import process. This means that, after I do the import, I have to manually edit each product and set the category. This makes the process just as long as if I manually copy an existing product and add the new one. So being able to import ends up not saving me any time in the long run.
A possible way around this would be for me to run an SQL query after I have done the import to set the category for all the products I just imported. As an example, a group of products would be named like this "weight-loss-xxxxxxxxxx" (where xxxxxxx would be variable). These would all be assigned to category "Weight Loss" (or I can find the category number for that category).
Can you provide me with the SQL query that I could use to accomplish this? I add a couple hundred products at a time, and being able to do this would save me lots of time.