Install and modification of PHPJabbers Car Parking Script

Can you help me with setting up a phpjabbers script and customising for my client.

It is the car parking script. My client currently runs an older version on an old Wordpress site. We are trying to build a new site, but the old script does not work. Also the old script only supports Paypal, and the client would like to extra payment options.

The issue I have, is the old script was modified, and the client would still like these modifications on the news site.

1) the old version has a cost per day option, as well as the Regular and Promo codes/ discount pages in the Prices section. This is because the customer wants to charge a minimum fee of £68 if the client books from 1 to 5 days, and then each day after that it increases, so 6 days id £73, 7 days is £78, and then each day after that is an extra £2 per day, up to 40 days when the price becomes £4.20 per day. This may be included in the new version, but if not can it be added?

2) on the booking details page there is an additional Print button. When pressed it it brings up a three page PDF. This in the printed and given to the meet and greet driver. Page one includes all the vehicle details, meet and greet details, client details, and a big red stamp saying whether the client has paid, or if payment is required. Page 2 is similar, but has a title called customer copy, and includes instructions of what the customer needs to do on there return. This is given to the customer. Page 3 is is retained for accounts purposes.

Thank you, I look forward to hearing from you.