smal 273Loaded/CRE loaded

I nedd somebody that can solve a few issues with an onlineshop. The sysem is 273 loaded 6.3, it's actually the same as CRE loaded 6.3. Here is a list of the changes i need. - making it possible to order subproducts out of stock. - if possible, adding a red button on product listing if products aren't in stock. - fixing the "register" button that "doesn't work" in the italian "sign-up" page. - adding bank transfer details in the email clients receive after the order is completed. - maintaining the language when going in ssl connection mode. That's all. Thank you.