Automated File Downloader

This project is for someone to build a better version of a little imacros script i built. Its not to be built in imacros (it can be built in any language). Currently my script visits a number of webpages from a txt list, and downloads a file (all browser simulated with imacros). The purpose is not to actually download the file, rather to increase the download stat. I have been able to do this with imacros although can not take the project any further for limitations on imacros. I'm not quite sure exactly what generates the stat to change on the page, although I have a number of things I know to be true/ and not to be true. This software would need to be multithreaded, and use lighter resources than imacros.