Well... if it were not for the missing brackets...

code:
while exist("%temp%\_ISTMP1.DIR")
  "."
  sleep 10
  $Index = $Index + 1
  if $index > 20
    $RC = MessageBox("NOTICE!" + Chr(13) + "Installation did not complete within a reasonable time!"
    + Chr(13) + "Please notify the FF HelpDesk at ext. 1864","IBM Client Access Express",48,60)
    goto finish
  endif
Loop

If not Exist("C:\Program Files\IBM\Client Access")
  ? "Core install failed, Retrying..."
  $RC = DelTree("HKLM\Software\IBM\Client Access")
  GoTo START
Else
  ? "Done the core install"
Endif
_________________________
Give a man a fish and he will be back for more. Slap him with a fish and he will go away forever.