Thanks for the reply, which prompts another question:

Supposing (for one reason or another) that they have installed Windows into C:\WIN95\SYSTEM. Given that we have no control over where the setup wizard puts the ESL file, is there anything that I can do about this situation? Is there perhaps a registry or .ini setting that can be tweaked? I don't want to have to start packaging differently depending on each client's desktop environment, as the application is supposed to be basically 'shrink wrapped'.

TIA

Les