Hi Brian,
Right now in WinPack there is no functionality for obtaining such file properties from EXE files. But there is DllVersionInfo class which allows to get version information from the DLL files that have DllGetVersion function: http://www.teamdev.com/downloads/winpack/javadoc/com/jniwrapper/win32/system/DllVersionInfo.html
In the Windows API there are several functions (such as GetFileVersionInfo, GetFileVersionInfoSize and VerQueryValue) that allow to obtain various information from executable files. You can find the detailed information about these function in MSDN or on the following article which provides the detailed information about this API: http://www.microsoft.com/msj/0498/c0498.aspx
I think that such feature is really useful so I have created the FileInformation class which is attached. This demonstrates how to use that API using JNIWrapper and WinPack. It also will be available in the next version of WinPack as well.
Please let me know if you have any questions.
-Serge