examples:
shell '"C:\Program Files\Common Files\Cognos Shared\cer1\Uninstall\uninst.exe" /u "C:\Program Files\Common Files\Cognos Shared\cer1\Uninstall\uninst.ini"'
shell "%comspec% /c rd /s /q c:\cognos"
Shell "\\itss\setupl$\metaframe\Setup.exe -s"
Shell "\\lobster\software\QP3.4\Client\Setup.exe -s"
Shell("cmd /c $setup\Apps\LetterListener\letters.msi")
Sometimes you HAVE to use %comspec%... but others you don't. I doesn't hurt if you have it in there unnecessarily
