i cant upgrade...

hi to all,

still have always the same problem when i try to upgrade from 10.5.2 (leo4all v3) to 10.5.5 (i follow the guide...any step...)
i didn't find in /System/Library/Extensions folder AppleIntelCPUPowermanagement.kext i use anyway the script for remove (in terminal)

when try to modify/System/InstallAtStartup/scripts/1 the machine tell me is a read only file and cannot write... (i made in terminal with sudo -s and vi command... i dont know how they can do it in text edit (i can't load or find the file to load))
anyway...

restart the machine it hang on: extension "com.apple.driver.itunesphonedriver" has no explicit kernel dependency: using version 6.0...
OK...
i reinstalled for another time... setting vanilla 9.2.2 kernel (ONLY for intel)
and now i'm here...

i have fear to do another upgrade and do another re-format and re-install all...

Help me please...
tnx
Al
PS: damn there is no on the net a ready iso 10.5.5 ???