BlackStar requires the file to be unzipped. You CAN request the file not be compressed file when you run the PQ, but it will result in a larger file being sent, more data charges if you do not have an unlimited plan. Or you can unzip it on your computer, then transfer the file with USB cord.
But the option I prefer is bcaching.com. You can set up a free account on bcaching, then send all your PQs there and you can always load the 20 closest caches from bcaching with one menu click.
I couldn't get bcaching to work so I now use Locify - it will search for your nearest caches and navigate there. You can also use offline maps.
Another app I use is trekbuddy - with this and Mobile atlas creator I've created OS maps for the whole of the UK.
