OScommerce : fix some bugs & add functionalities in modules

Here is a list of what we would like fixed on a customized Oscommerce (an OS commerce with modified Customers Add Products module): 1/In the [login to view URL] page, manufacturer customers should be able to change their logo, company name and company url. 2/Registered users as "standard customers" should have the possibility to upgrade to a manufacturer account on their account manage page. When clicked, they will have to fill the extra fields found under the manufaturer account creation. They will recieve one credit to add a product. 3/When manufacturer customers add a product, it should not be possible to add it in the root of the catalog or a category but ONLY inside a subcategory. 4/Manufacturer customers should have the possibility to attach a document (pdf / word / xls - and nothing else, for security reasons) to each product when adding a new product or editing a existing one. A link to the attached document should then be shown on the product page (it's the same thing than the logo image, a new file replace the old one. Very simple). 5/Fix the "company name" field in "[login to view URL]". It's mandatory in english but not in french. It should be mandatory in all the languages. 6/ We need a box on right colomn, displaying last 5 products of a subcategory (alway the same subcategory is listed). It need to display the date when product was added, product title and a few world of the product description. Title is a link to the product page.