When theres a will theres a way... On my iPhone I use Boxytunes GREAT app does exactly what you are asking check it out
http://itunes.apple.com/us/app/boxytunes/id408589605?mt=8&ign-mpt=uo=4
Not sure if GoodReader can do that but I wouldn't be surprised if it could...GoodReader IMO is one of the MUST HAVE iPad apps...what an AMAZING app it is especially for just $4.99...talk about Bang-For-The-Buck!
What's so good about GoodReader? Want to give us some intel?