How to get InstallShield LE to uninstall the existing installation automatically?

Question

Is this possible?

All I can see searching around is basically that I need to use 3rd party tools (e.g. Orca) to get GUIDs from my existing MSIs and configure Install

Answer 1

Go to "upgrade path" and set min version to blank, max ver. to current. include max/min to yes and set all code ids to one guid.