I have 10 files, about 5 GB each that I need to upload nightly.  Doing them with one session (sequentially) takes about 3.5 hours.  Transferring each file via GUI simultaneously reduces overall time to about 30 minutes on the relatively high bandwidth connection I have.
I'm trying to figure out how to script the simultaneous transfers.  My understanding is that I have to create simultaneous sessions in order to do this, but this code still seems to process sequentially/synchronously.  I'm very new at scripting, so perhaps I'm making a fundamental mistake here or making assumptions in how this would work.  Any guidance would certainly be appreciated.  Thanks in advance!
	Set objFolder = objFSO.GetFolder(zipfolder)
	Set colFiles = objFolder.Files
	For Each objFiles in colFiles
		filename=objFiles.Name
		Set session(x) = WScript.CreateObject("WinSCP.Session")
		session(x).Open sessionOptions
		UpdateStatus("Uploading file " & zipfolder & "\" & filename & " to " & DirToCreate & "/")
		Set transferResult(x) = session(x).PutFiles(zipfolder & "\" & filename, DirToCreate & "/", False, transferOptions)
		x=x+1
 	Next
	' Print results
	For y=0 to x
		transferResult(y).Check
		For Each transfer In transferResult(y).Transfers
			'WScript.Echo "Upload of " & transfer.FileName & " succeeded"
			UpdateStatus("Upload of file " & transfer.FileName & " succeeded")
		Next
		' Disconnect, clean up
		session(y).Dispose
	Next