proxy support

Hi, i'm searching in all the web and not, a Software that allows me to load an huge list of urls and then it will download the file contained in each url. I tried Internet Download Manager but it allows only one proxy at time so it's too slow, i need something more fast. Here's the Must...

I've been working on macros for a while and made some very good ones for twitter but for Instagram I need to create multiple accounts with proxy support. How can this be done? All suggestions welcomed.:)