what can i delete off of my Dell, without messing anything up?

ad-aware 2007
adobe flash player activeX
adobe reader 8.1.2
AIM
Aim install
apple mobile device support
apple software update
ATI catalyst control center
ATI PCI express (3GIO) filter driver
banctec service agreement
bonjour
broadcom management programs
browser address error redirector
catalyst control center-branding
CCleaner
conexant HDA D330 modem
dell aio printer
dell datasafe online
dell Getting started guide
dell support center
dell touchpad
dellsupport
digital line detect
earthlink setup files
google desktop
go toassist
internet service launcher
ipod for windows
itunes
java runtime
limewire
mediadirect
microsoft office home and student
modem diagnostic tool
music,photos,, and videos launcher
netwaiting
netzeroinstallers
outlookaddinsetup
quickset
quicktime
all roxio items
trend micro PC-cillin internet security
user’s guides

thanks a bunch..specifics please