Edit a Wordpress Template

THIS IS FOR WORDPRESS and PAYPAL API EXPERTS ONLY We have a website that is a job posting website a little like Freelancer. It has monthly packages built into the site that the user can sign up to and pay with paypal. Signing up to packages allows them to bid/quote on more jobs. [login to view URL] This works perfectly however at the end of the month when the package expires the user then has to go back in and purchase the package again. We want to change this so that when a user buys a package they setup a paypal subscription that is auto billed and keeps their package going. A user should be able to upgrade/downgrade their package and the site will cancel the users old package and create a payment and start date for the new package. At the moment if a user uses up all their credits (bids/quotes) then a message is displayed telling them that their package has expired. We want to keep this function to prompt the user to upgrade when they run out of credits. It should be noted that there is an admin section in the back of the site to create new packages: [login to view URL] we still want to use this and therefore payments etc. using the paypal API should change when we make changes! If you have read this then start you proposal with the words 'HUT898' - if you don't start your proposal with this then your bid will be deleted.... Payment is on completion and testing. (For testing you may need to reduce package times to 1 day!)