While I would never recommend doing this, I have seen a "Working" batch file that contained quotes only around the directories that had spaces... the first time I saw it I was sure this could not work, but in fact it did...using your example...

code:
  Shell '%COMSPEC% /C \\Server\Share\"Oracle install"\setup.exe -responseFile \\Server\Share\"Oracle Install"\Clientappuser.rsp -nowelcome'
Who knows... it might work? [Razz]