Authorize.net AIM Integration

Hello, I would like to be able to integrate a payment form with the information required to receive a credit card transaction through authorize.net. I will be passing a couple variables to the form such as the User's name, email address, total price, etc. I need to be able to submit transactions and give them a thank you page or error page depending on the result from authorize.net. I want it setup exactly like this site: [login to view URL];AMOUNT=&NO_HEADER=&ORDER_NUMBER=&TYPE=2&NAME=&COMPANY=&ADDRESS=&EMAIL=&NERD=&CITY=&PROVINCE=&POSTAL= I would like to also get this done in the next week. I need it to be integrated into my site just like the over company has on their site. Max budget for this small task : 30$ Thank you