hi! what are some essential apps i should download/buy? what is the best task killer? how do i put music on my hero, is it the same method as ringtones/notifications? is there any way to free system memory for example, can i in any way delete/uninstall preloaded apps like gmail, sprint mobile nfl live, peep, etc., etc.?? i appreciate any advice/links/secrets. im new to android and am loving my htc hero so far. also, i installed advanced task killer free by rechild. is the $4.99 pro version better in any way?? thank you very much for your time...and patience.