Captcha Security Decoding

I need someone with extensive knowledge dealing with captchas and working around them. This particular is a very difficult one but it might be passed using header modifications, image libraries, cUrl, etc. The first and most important part of the project is this, further work expected once this is accomplished. Do not bid if you can't do it. I will not use prepaid milestones on this project, as it's uncertain it can be done.