Your best bet would be using Easy
GPRS to load pics onto your phone. You can then upload JPGs and GIFs and it will look fine. Just check compatibility of the software with your phone. Usually you can find it at the Samsung Fun Club (UK site) which has a nice wizard for selecting the right software for your phone.
With Easy
GPRS you can also easy load the pics from your phone to your PC in JPG format, works perfectly!!
Regards
MtraX