cURL form submitter

I need a PHP script that can submit forms on remote websites using cURL, These forms may have a number of different form elements including captchas which the script must be able to complete based on user submitted data. for the captchas it either needs to present the user with the captcha so they can enter it and the script can continue or it can use a system such as the api at [login to view URL] more details on the types of forms that it has to fill will be given on successful bid ******** It is also important to note that i do NOT what this for spamming purposes*********