Please follow these instructions carefully /t/1505008/locjamming-for-dummies.
Then click on this link /jam/309833/add-game/1113111?token=bUBdNqEpVcweTCjnSA0ZIRnHFk
Thanks a lot, Alain, we've been able to uploaded at last :) Now only we have to personalize the profile a bit.
