Make paypal system + register | in order to see the content

Job explanation: Now can download songs on my site for free : [login to view URL] i want that the download option will be hidden . pic what i talk about : [login to view URL] pic how i want it to be hidden: [login to view URL] in order to watch this download you must sign up and make payment with Paypal / 5$ for 1 month. the regisration and payment should be in the same page and not leads the users to new pages. all this proccess should be fast and easy for the customer. thanks you4_spotify 3e-C+ZeTwTO] you4_wop {wis0@^{tQp{