I took Hagar`s idea of pointing the retail dvd to a patched OSInstall.mpkg. This way you can install on MBR and inject some Extra pkgs. One way to do it is booting the retail, open a terminal window and type the following:
CODE
/System/Library/CoreServices/Installer.app/Contents/MacOS/Installer /Volumes/MYUSBDRIVE/OSInstall.mpkg
You need to change some paths inside Distribution to point to the retail DVD.
change all the paths like this
CODE
<pkg-ref id="com.apple.pkg.X11User" auth='root'>file:./X11User.pkg</pkg-ref>
to
CODE
<pkg-ref id="com.apple.pkg.X11User" auth='root'>file:/Volumes/Mac%20OS%20X%20Install%20DVD/System/Installation/Packages/X11User.pkg</pkg-ref>
You can also add some Extra.pkg but it should be located next to your OSInstall.mpkg on the USB Drive.
CODE
<pkg-ref id="com.apple.pkg.Extra" auth='root'>file:./Extra.pkg</pkg-ref>
OSInstall.mpkg with Extra:
http://is.gd/BGAf
QUOTE (modbin @ May 18 2009, 02:00 PM)

I took Hagar`s idea of pointing the retail dvd to a patched OSInstall.mpkg. This way you can install on MBR and inject some Extra pkgs.
OUTSTANDING!
This what I originally wanted to do but took the shortcut instead. Flat Package Editor & Texedit can also be run from the install DVD like this so the whole process can be done in one
old guide is
hereDo you think this could be used to install off restore discs too?
Edit 1. nov 2009:
I quickly did this for my own use with the 10.5.4 retail DVD. This is the patched & tested OSInstall.mpkg with MBR check removed & .pkg paths hardcoded as per above.
OSInstall.mpkg.zip ( 804.09K )
Number of downloads: 257
yay, something to play around with.
thanks modbin!