To upload stuff, go to Content Manager Plus. Click on the 'manager content' button on the launcher screen to do this.
Now search for the item that you wish to upload. It must be under your own kuid to upload. Right click on the item, then click on upload. click through the next few windows, then click on 'start' and it will start uploading. Once it finished uploading, it will go through an automatic check (this normally happens during the night in Aus), and will then be placed in a waiting area till it is approved on our end. Once approved, it will go onto the DLS for people to download.