adding functions to a shopping site

i have a shopping web site . i want to add some functions in order to modify the site. 1- at the left menu,there is a random picture of a product showing. i want to show more than 1 product in this section.2-3 product 2-a simple ,email address collector at home [login to view URL] a sender page at admin.i mean the customer will write his email address for receiving news. 3-a simple order tracking section. the customer will write his email address and order number ,and see the order status. 4- in admin ,i am adding products under one selected category. i want to add products,in to 2or3 or 4 different categories at the same time automatically. 5- fix some unsafe sections .make the site hackersafe. About the site: my shopping site is a very easy script. it doesnot use any database. there is no membership. please check the site at [login to view URL] (redirected to main site,vip) please look at the site and give your bid.