Android PhoneGap expansion pack

I have a PhoneGap app that contains to much data (audio, video, less than 2GB) to be uploaded On Google Play (50 Mb limit). Your job is to add an expansion pack, and handle the case where the expansion pack has not been downloaded automatically by Google Play. So when the app starts it must checks if the pack has already been downloaded, and if not, download it. The pack files should then be unpacked/unzipped to a directory accessible with PhoneGap's file API. This have to be done by monday the 3rd of march 08:00 am GMT+1, please apply only if you are sure you can get it done by then. The ideal candidate should have a good knowledge of Phonegap, Android and having already worked with expansion packs is of course a plus.