I know PS3 does it quite easily through USB. Not sure how you could do it on 360 though?
Hmm: more fiddly, but does seem possible...
1. On the Xbox 360 Dashboard, customise your USB storage and make sure it is set at 768mb.
2. Plug the USB into your computer, and open the drive in the explorer.
3. Go to Organise -> Folder and search options, then allow hidden files/folders to be displayed
4. Browse through your USB and find the hidden Xbox360 folder.
5. In the folder, you will see three files; Data0000-0002 - you need to erase Data0001 and Data0002
6. Open up the downloaded file, extract it, and copy the Data0001 and Data0002 files onto your USB
7. Safely remove the USB, insert it into your Xbox and copy the entire WE/PES2014 folder over