I have never submitted anything here, so I don't know how the download submission process works. Also, the system might work differently for me than for you. But this is what I see. When I click one of the DOWNLOADS in the top menu, I see "ZT 1 Download Submissions" and "ZT 2 Download Submissions". When I click "ZT 1 Download Submissions", I see a list of submitted files and there is "Add a download" near the bottom. When I click "Add a download", it shows a form asking for Title, Category, Description, Keywords, Upload File, Upload Url, and Additional Options. Next to Category is a selection box. By default, "ZT 1 Download Submissions" is in that selection box, but it can be changed to "ZT 2 Download Submissions".