I have recently found a new way to upload your map/file for a beta test. Its very easy as you install it onto your pc and you get a folder. You just drag and drop into it a voila. Just follow this link for more details: https://www.dropbox.com/ You start off with 2GB storage and it builds up. You can even share a folder between computers so its extremely easy to send each other files even when the other person isnt online! Try it out its free. You can even access files on apple or andriod phones!