OSC Admin Modification + Registration form

We would like to add new fields viewable only by admin we should be able to add a note to the product, also should be able to add up to 10 photos. the note should be searchable by admin only. example: if we are selling a wheel, we should be able to add a note saying that this wheel fits this car but needs xyz modifications, with pictures to view makes it easier to understand. operator should be able to search products with notes (search in notes only) for any word or combination of words. Genuine OSC search field and functionality should not change, all new fields should be stored in separate table(s) Also we would like to do a registration form for resellers, when a reseller sings up we would like to receive an email so we can check status, all reseller information (extra info on top of what is required by OSC) should be stored in a separate table.