ISScript,msi

Running Setup.exe (InstalShield – WinXP RC2) I get this message:

“The feature you are trying to use is on a network resource that is unavailable.
Click OK to try again, or enter an alternate path to a folder containing the
installation package ‘ISScript.MSI’ in the box below.”

I cannot find any folder containing the ISScript.msi. Is there a solution for this? I am logged on as Administrator.