Change iPhone screen grab file type

[abfarmer9]

I'm running OSX 10.5 I just found out today that it's possible to change your screen grab (CMD+3 or 4) file type throught Terminal using the lines:

defaults write com.apple.screencapture type jpg **jpg/tiff/gif**

and then

killall SystemUIServer

Would it be possible to do this on an iPhone using Mobile Terminal? I'm not very familiar with using Terminal, but I know it's dangerous so I'd rather not just give it a shot and have to restore my phone if it doesn't work.

Anyone have any input on whether this would work? Not being able to easily upload screen grab pngs to facebook is annoying.

[lastactionhero]

I'm not sure of how to do that, but I got an app called image converter and it converts it to a jpg for me so I can upload it to FB.