What is the TV resolution you're playing at - there is an issue with keeping HUD settings when playing on Standard Resolution (non-HD) screen - in 480 mode. You can also take screenshots directly ingame by holding L1 and pressing Start. Those will then placed in your PS3's XMB in the Picture photo folders from where you can either copy them to the USB flash drive and then you'd need to upload them first to some picture sharing web site to be able to upload it here using the web link to the particular picture (I know it's a bit hassle but once you'll figure it out it's actually not that difficult anymore). If you use twitter or any other social app / site they also allow you to upload picture and provide you with the links to them.