From the Bulk Lister menu (Admin Control Panel -> Settings -> Site Settings -> Bulk Lister):

Enable Bulk Lister

If checked, enables the bulk lister tool. The bulk lister will parse CSV files.

Front End

From the Bulk Lister (Home -> Members Area -> Selling -> Seller Tools -> Bulk Lister) menu, select to:

Upload Bulk File

Select the CSV bulk file that will be uploaded. The feature accepts standard CSV files that contain various information regarding the items that will listed.

and

Upload As

Select how to upload the listing.

• Drafts
Items will be listed as drafts and will be available for ulterior review.
• Live
Items will be listed as active items, (available for sale) but can be edited at any point.

If the file is completed correctly, after uploading it, you'll see the following:

And it will be automatically displayed in the selected sections (Drafts in the caption below).

From the Drafts section, select the product(s), click List, and confirm the listing:

The next screen will display a confirmation message and the transaction fee perceived for the listing (if set):

The listed item(s) will be available for viewing and editing in the Open (Home -> Members Area -> Selling -> Open) section: