I was going through the packages on my Cydia and noticed there were quite a few packages installed. I'm trying to optimize the speed of my iPhone 3G (I've already disabled spotlight, deleted a lot of LaunchDaemons, use SBSettings Remove BG and monitor my memory yet I get at about 30 average with phone always running). Now, I'm just a regular user and don't think I need all these complicated things that have been installed by default. Are they important or can I uninstall them? They slow down Cydia and my iPhone a lot.