i have to point out that this is the first time a build an e commerce site, so if this question seems a bit noob i apologize

i want to enable an online credit card payment method that is composed of a form that is sent to the credit card proccesor ( Yaad pay - israel based company)

from their instructions, im supposed to create a form that has this in its code -
<form name="yaadpay" method="post" action="https://icom.yaadpay.url etc'">

the form has to include these fields:

action ("post")
Masof (name of the site owner terminal)
Userid (CC owner ID)
ClientName (cc client name )
Amount (money)

and so on and so on

how do i intergrate this to my zen cart instalation???? in simple words what i need is that the details of the client purchause will be transfered to the CC company (yaadpay) in a form that has to be built according to their instructions

i have bought a SSL certificate, ive enabled it on the site, everything is fine on that matter

please help! nothing that i found answerd my question, but it just might be that there are answers that i simply dont understand

thank you all for your help