In that case, you can use the WScript.Shell object, and execute the Run method to run the executable.

[vbscript]

set ox = Server.CreateObject("WScript.Shell")
ox.Run "MyExe.exe",1,True
set ox = Nothing

[endofcode]

Check this URL for definition of the PEMs.

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/script56/html/wsobjwshshell.asp