>>>From DOS command window: SUBST F:\ C:
>>
>>But that needs to be permanent - the app would install on C: drive. If that command is not executed at startup, after the next one there'll be no C: drive and the app won't be able to find its legs.
>>
>>I don't see any solution other than building a setup which will allow the installation to proceed on an arbitrary, user selectable, location.
>
>You can have SUBST F:\ C: in autoexec.bat

I know and I did have it for a while - for those few pieces of software with lousy setups, which can't find their own butt unless it's on the C: drive. But Lucien's problem is how to create a setup, and I figure he'd better do it right - how's he going to write a line in end user's autoexec, make sure it remains there, run that command before the setup even launches - all that from an old version of IS? I don't see how it would work without his intervention.