Cache Progressive downloaded content in MPMoviePlayerController

Question

Hi, I have a music player implemented in iphone (sdk 4) and it works both with streaming of Mp3 (Transcoded on the fly) or raw progressive download.

Is there anyway to make the progressivedownloaded content (which I dont directly control) to be cached so it doesn redownload the whole content?

Or Is there a global cache setting to control? (On a side note, I used ASIHTTP APIs to contact my HTTP server and access data that does allow caching).

Thanks in advance.