1.Go here: http://filesmelt.com/simple (you don't have to use this site, but this is a good one so I recommend it)2.Click upload3.Select your file4.Copy and paste the link in the yellow box with completed on the top of it into a post.5.People can now download your file from that link.
Why not just use MF like most people?
Why does it matter to you what the OP uploads to? MediaFire isn't a requirement.
The thing is mediafire has no waiting limits.