Games : Is it possible to download a purchased 360 game to the pc, and then install it on the xbox via USB?

I currently have a very limited internet connection at home, and downloading a huge multi gigabyte file isn't feasable.

I do have access to very high speed internet somewhere else though, so is there a way to download a game I officially purchased via the Xbox 360 Marketplace to a PC and then use a USB to carry it home?

Note: I CAN use a bit of internet connection (tethering from my phone) if it needs some kind of verification that I've purchased it.

Thanks!