create checkout with amazon payment option

we need to add 'checkout with amazon' payment option to our website. the site is live, already has different payment options. we need someone who has skills in adding 'checkout with amazon' as a payment option to our site. our site is done in php, mysql and has custom shopping cart. i would not give you ftp details for the site, but i can send you any files you want for this, including any other information you might require. bid only if you have done amazon payment option before. we need the project to be done within 5 days. for quetions let me know thanks