i installed cydia on my iphone via pwnage tool 2.0 and when i look through possible things i may download it says this application has been sighned. what exactly does this mean? and on a side note are all applications in cydia useable on iphone firmare 2.0 and if not which are downloadable? (i ask this because i intalled mountain dew sliders and i ended up without a slider) :iphone::iphone::iphone::iphone::iphone: