Hi,
Sorry that I answer so late but I was travelling back from Flock what me took 3 days.
As Matt said, the normal process is done via Nuancier. For getting a FAS account and sign the cla/fpca a phone number is not mandatory.
In generally we prefer PNG over JPG as it is a free format. But JPG is fine also. If you still have problems with the upload, I can upload them for you but I have to quote your name with CC-BY-SA, only CC-0 would allow the use without quote and you should be quoted for your master pieces.
If I shall upload them, tell me. It will take same time as I still travel, I can try to do it over weekend from the conference booth in Cologne, otherwise it has to wait until I arrive next week in Phnom Penh
br gnokii