There is a guide here:
phpBB3/viewtopic.php?t=980
Might be a bit dated now, but should still get you going.
There are also photobucket apps for your phone, so you can upload directly from your phone to photobucket.
Posting pictures from your computer
Posting pictures from your computer
RD350LC- RGV Mods, PWK28's
RZ500 - YZR Replica, PWK28's
RZ500 - YZR Replica, PWK28's