Nevermind....I just found the answer.
Sending the following command in ARD to the computer in question will tell you if a computer is running in 32 or 64 bit mode.
system_profiler SPSoftwareDataType
System Software Overview:
System Version: Mac OS X 10.6.8 (10K540)
Kernel Version: Darwin 10.8.0
Boot Volume: Macintosh HD
Boot Mode: Normal
Computer Name: test1mac
User Name: System Administrator (root)
Secure Virtual Memory: Enabled
64-bit Kernel and Extensions: No
Time since boot: 1 day22:46
If it says "No" next to "64-bit Kernel and Extensions" then it is running in 32 bit....if it says Yes then it is running as 64 bit.