To modify the Setup source path with Registry Editor, modify the following registry key:

HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Setup\SourcePath

If you are also changing the media type (ex: from floppy to CD) also do the following:

After you update the registry with System Policy Editor or Registry Editor, extract a new copy of the Layout.inf file from the Precopy2.cab file on your new Windows 95 media to the Windows\Inf folder on the hard disk. For example, if you are changing the Setup source path because you switched from Windows 95 disks to a Windows 95 CD-ROM, extract the Layout.inf file from the Win95 folder on the Windows 95 CD-ROM to the Windows\Inf folder on the hard disk. For information about using the Extract tool, type "extract" (without quotation marks) at a command prompt.