Set up a program for each content outlet, create a new channel for Content Syndication and have the progression statuses match that of the names of your collateral - or - create a custom field on the Lead to hold the name of the piece of collateral and use a progression status of "Converted".
Either way, upload your list to the program corresponding to the content outlet and set your progression status accordingly. This should allow you to get effectiveness by program and also by content download.