I am currently using Magento version 1.9.1, therefore I can't really use this plugin which does exactly what I want: 
<http://www.magentocommerce.com/magento-connect/simple-configurable-products.html>

Is there a plugin (paid or free) that works for 1.9.1 and I can use it so when you select an option while on a configurable product, it fetches the SKU, price, images and description of the SIMPLE product? Also its very important for special prices to work, because for example I have a simple product that has different prices for Silver, Gold and VIP members so depending on what group the user is in should receive the correct price from the simple product price table when selecting an option.

Hope I was clear and thanks in advance.