Where do you get the merchant ID, the api key, and the api secret key. There is anothe option called manage hooks, that I don't know what is for. There is not much instructions neither.
Check this Magento Module Video
https://mtgox.com/merchant you will see where to find the keys you need on your account
Thats all good, but Prestashop is not Magento based. Asfar as I can tell they are two totally different publishing platforms.