替换OSInstall文件时，需要同时替换两个文件

OSInstall & OSIntall.mpkg patched * * for MBR based partitions. * This patch enables the installation of Mac OSX 10.6.3 Retail (Build 10D575) on MBR formatted hard disks, thus allowing multiple booting with other Windows OS. Like in the previous 10.6 version, you have to replace 2 files in the original dvd content: -OSInstall goes into /System/Library/PrivateFrameworks/Install.framework/Frameworks/OSInstall.framework/Versions/A/ -OSInstall.mpkg goes into /System/Installation/Packages