is there a download manager for ipad that is free that will be able to get downloadable files from the web
I don't know about free ones, but the browser I use (iCab) is cheap enough, and is great for downloading. iUnarchive will unpack the file. iUnarchive has a free version, but I bought the full version of that since it allows you to send the file to an external application. If you can afford to buy an iPad I think you can afford the apps.