With kind help from visionz I was able to come up with an independent, purely scripted version. It's not as fast as a DLL, but not terribly slow. Examples,

//echo - $VerInfo([color:purple]mirc.exe)
//echo - $VerInfo(mirc.exe).ProductName
//echo - $VerInfo(mirc.exe).FileVersion[/color]

These resources helped me to understand the Portable Executable file format, and therefore to make the script: