[wpkg-users] Deploy different versions of wpkg dependent on XP/Seven

[zorgman]

Hi,
I'm used to deploy wpkg by a batch script which run wpkg.msi with 
correct setting info ...

Now i have some old XP and new Seven 64bits, i need to install different 
version of wpkg dependent on OS Version/bits.
Do you now en easy way to do it? May be a script already exists? I have 
tried to use %OS% environment variable but it returns alway window_NT.