400247 Csv data import tool 2

Hi I have a CSV file from my supplier that has approx 7000 products on it. The products have diverend sizes, colors and mirror option. What i want to do is be able to load those products into Oscommerce, and update the products that i already have in the database, so its not just a case of uploading it, but i need to be able to select which products are uploaded from the CSV file first. Also i need to be able to add new descriptions and change titles, categories, quantities etc before the new products are uploaded, also be able to delete products that are not required in the database. I will need the description field to be WYSIWYG and keep the formatting when uploaded. I hope some one can help. Thanks Bert Niesing