I need to be able to use custom fields only in my download addon

Hi, I have both Ocportal and Composr. I have a serious problem. I am trying to set up a website that will allow users or registered members to upload mp3 files for downloads but the problem is that the Download addon is not specifically designed for music downloads, so the default fields do not really apply when it comes to music so I want to be able to disable default fields and add custom fields but I simply do not see that option in ocportal and composr. I badly need to be able to deactivate or activate the default fields or edit them so that they can be used in the site. For Example, the field Name needs to read Song Tittle instead. Please Help me Solve This.

The Gallery feature is better suited to handling media such as mp3's.

If you need exact control of fields, it would have to either be a catalogue or custom developed. If you want more functionality than catalogues can do, e.g. something you liked in the download system specifically, that would definitely be custom-developing.