A few days ago I've to write a small
VBScript 
in association with PsExec for executing an ms-dos on a remote computer. No issues but...
After few unsuccessful tries; no way to get the StdOut I've start finding other reason than my poor programmer knowledges. So after few search on Google, I've discover that there is a known bug on PsExec versions prior to 1.98.
As ever and as recommended by software and hardware providers always update to the latest available version of code...
So here's the
link to PSTools lastest version on Microsoft website. These tools are certainly the most useful toolbox for a Windows administrator. That might explain why Microsoft has acquire
Sysinternal 
some times ago...
If it helps, here's the script which should works with PsExec v1.98. Provided as is...
Option Explicit
On Error Resume Next
Dim WshShell, oExec, Cmmd, CptName, UsrName, UsrPWd, PsxCmmd, PsxReturn, PSPath
Set WshShell = CreateObject("WScript.Shell")
CptName = "ComputerName"
UsrName = "UserName"
UsrPWd = "Paswword"
PsxCmmd = "ipconfig /all" ' MS-Dos command-line example
PSPath = "C:\WINDOWS\PSTools\"
Cmmd = PSPath & "psexec.exe \\" & CptName & " -u " & UsrName & " -p " & UsrPWd & " " & PsxCmmd
Set oExec = WshShell.Exec(Cmmd)
Do While Not oExec.StdOut.AtEndOfStream
PsxReturn= oExec.StdOut.readall()
Loop
wScript.Echo "PSXReturn :" &PsxReturn