aqui te explico como desastivar eso itune helper pero
yo tengo un iphone con jail y no lo es desastivado..
Mac os
To stop iTunes from opening for ANY iPod:
System Prefs > Accounts > (Select Your Account) > Login Items Tab
Remove the "iTunes Helper" item and it will stop iTunes from opening any time ANY iPod is plugged in.
Winxp
goto-->start-->control panel-->administrative tools-->services-->then find iTuneshelper & iPodservice-->right click-->properties-->set 'startup type' to disabled