I just tried running the ITUNES 7 install from a downloaded package and this is the log I saw in /var/log:
Sep 15 21:34:17 jeff1 : @(#)PROGRAM:Install PROJECT:Install-137 DEVELOPER:root BUILT:Jan 23 2006 20:09:15\n
Sep 15 21:34:17 jeff1 : @(#)PROGRAM:Installer PROJECT:Installer-86 DEVELOPER:root BUILT:Sep 2 2005 14:24:50\n
Sep 15 21:34:17 jeff1 : Hardware: PowerMac7,3 @ 2300 MHz (x2), 1536 MB
Sep 15 21:34:17 jeff1 : Running OS Build: 8J135
Sep 15 21:34:17 jeff1 : iTunes Installation Log
Sep 15 21:34:17 jeff1 : Opened from: /Volumes/iTunes 7/iTunes.mpkg
Sep 15 21:34:18 jeff1 : It took 0.134286 seconds to load 7 UI sections
Sep 15 21:34:18 jeff1 : Unable to load mainNib file (ReadMe) for plugin bundle NSBundle </Applications/Utilities/Installer.app/Contents/PlugIns/ReadMe.bundle> (not yet loaded)
Sep 15 21:34:18 jeff1 : It took 0.569849 seconds to finish launching.
Sep 15 21:34:20 jeff1 : Distribution: iTunes
Sep 15 21:34:22 jeff1 : Installation checks completed successfully.
Sep 15 21:34:28 jeff1 : Unable to load mainNib file (PackageSelection) for plugin bundle NSBundle </Applications/Utilities/Installer.app/Contents/PlugIns/PackageSelection.bundle> (not yet loaded)
Thanks