Captcha bypass program for social networking site

I need a Windows EXE that I can send a GIF file that will process the captcha contained in the GIF file and spit me out the correct (or at least 60-80% correct) answer for that captcha into either a text file or the clipboard or whatever. This is for the most popular social networking site (I won't name names, but take a guess). I can send you about 500 beaten captchas in GIF form and an MDB file with mostly correct keys that I've entered manually if that helps. I can also send you links to the generation code. I know that this has already been done, so if you have code to do it make a bid and we'll discuss.