Quick Joomla Task

Hi all, I have a joomla site. Version 1.5.14. Legacy mode is ON. I have softwares to offer at the site. This is how I want it to work. Anyone who visits the site, can download the software's demo version AFTER filling up a basic form which catches their basic details such as name, email address, phone number. I would prefer this information to be stored in the admin panel (secondary task that is not so important: admin should get an email when a user downloads a file). Also while downloading this demo version the user do not has to go to his email inbox or anything of that sort. He just gets to download it as soon as he clicks the download button on the product page. Also, he should not see the download directory location. Also, the product page should also have a paypal button so that any client can dowload the paid versino as well after they make payment via paypal. and ofcourse when users pay via paypal, they should be redirected back to an appropriate page of the site. Please bid realistically. Successful candidate may win bigger jobs as well later on. I want this to be done asap. Preferably in 1 day or less. You will make change on a makeshift joomla site, and you will document all the chagnes you make. Then youwill send me the details and I will implement the work on the actual site. There is going to be no discussion about this. thankyou and happy bidding,