Customize RSS Feed in Magento

Job is to change standard Magento RSS Feed (Category) and customize it so to: **1) Include more fields (ie: now price and other fields are together in DESCRIPTION field) and make it compatible with Google Base and similar** **2) Include custom fields specific for my site** **3) Give me the ability to set conditions for the creation of the RSS Feed (ie: don't show items out of stock)** This is just for the RSS Feed (In Magento is NOT customizable). Site is ok! Magento standard category RSS feed has only TITLE, LINK, DESCRIPTION... I need (as Google Base requests) TITLE, LINK, DESCRIPTION, CONDITION, ID, PRICE, SHIPPING, BRAND, AVAILABILITY, MPN, IMAGE LINK. **_Applicants MUST..._** **_1) Be real freelance (not company, no subcontractors, no part time freelancers)_** **_2) Read, write, speak good english. Available during working hours for real time live chat sessions_** **_3) Have strong experience in Magento (not just generic programmers, however good)_** **_Please DON'T apply if you don't meet these conditions._**