[Suicide Junkie]

The upload form only appears when you are posting in the upload forum.

Click "Intel Forums", and check out the first forums listed there.
Pick a thread in that upload forum, and "post reply"
On the left, where it currently says "Uploading not allowed in this forum" to me, you will see "View Upload Form" or some such link.

Click that, and you can upload a file. Take careful note of the name it gives you, since the name will be a many digit number, and there is no way to recover that number if you forget it.