PackageMaker differentiate between PPC and Intel

Okay, so, I'm making an install开发者_运维问答er package for Mac OS X. I have it place a driver file onto the system, but there's no Universal version of the driver. How can I make the Installer drop a different file depending on whether the computer is a PowerPC or and Intel? I checked the "Requirements" but the closest it would let me get is to require certain processor speeds or Mac OS X version numbers. Is there a way to require certain architectures as well? Thanks.

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Use Result of Sysctl with hw.cputype (PPC = 18 and Intel = 7).

CPU types:

#define CPU_TYPE_MC680x0   ((cpu_type_t) 6)
#define CPU_TYPE_X86       ((cpu_type_t) 7)
#define CPU_TYPE_MC98000   ((cpu_type_t) 10)
#define CPU_TYPE_HPPA      ((cpu_type_t) 11)
#define CPU_TYPE_ARM       ((cpu_type_t) 12)
#define CPU_TYPE_MC88000   ((cpu_type_t) 13)
#define CPU_TYPE_SPARC     ((cpu_type_t) 14)
#define CPU_TYPE_I860      ((cpu_type_t) 15)
#define CPU_TYPE_POWERPC   ((cpu_type_t) 18)