Php programmer need

I have an open cart website and i need payment gateways extension by authorize.net. The thing is that i don’t ve any idea how can i make these extensions, how [login to view URL] is working and many others. I just would like put my website visa, MasterCard, american express options. At this point i need your help for system installation. The other issue is shipping extension. If you can assist me about zip code based shipping extension and installation i would be glad too. For now i urgently need assistance from you to buy [login to view URL] certification and installation. 1. I decided to use PayPal Pro so i need and installation about it. 2. I would like use ups extension but i ve a problem about freight shipping. i cannot make freight shipping by ups extension and my online store based open cart so i need a solution about it because ups api files are php and they are not fix my problem. 3. If ups extension will work it suppose to be i don’t need zip code based extension too.. 4. I need an e-check option but it s not easy to find this extension too..Can you find? 5. About pay pal pro i need to cancel american express if it is possible, this is another issue too. I have ssl certificate already, ups account and access key and PayPal pro access keys are ready. I need this within couple of days. So please let me know if you have any queries.