Magento Expert Needed

Magento site already installed within a Theme called "MILANO" from themeforest A test running up here: [login to view URL] Version Community 1.9 Specific Requeriments 1. Ajax loading for products listing - Loading next products via Ajax Using a BUTTON each time to load X products FOR HOME AND DETAIL PRODUCT - I noted there is something easy explained at STACKOVERFLOW [login to view URL] Extension - Already installed, we need just to: - Extend it by letting user to set a post featured image for each post (a SELET FILE FIELD maybe?) [login to view URL] Checkout - see image1 [login to view URL] /Others - Custom secondary menu AND CUSTOM SECONDARY/CATEGORY PAGES -- see image2, image3, image4, image5, image6 - Prev-Next BUTTONS actions to load prev or next products from DETAIL PRODUCT PAGE - Extend CMS > PAGES by letting user set a featured image (a SELET FILE FIELD maybe?) 5.A store selection with googleMaps, even using HTML5 Geo - See image7, image8 [login to view URL] an existing Payment method called PAYU see "image9" and change its name to make it looks like an authentic one. - This extension stores some TEXT INPUT VALUES and we need to change some LABEL at backend and MAYBE changing class name BUT it should keep the same behavior. All images attached