Does'nt matter. You can install LS SP1 before migrating - on the 32bit system. Or you can install on the x64 system. Because after adding the reg keys, LS is offically installed, with all system paths. So the updater is able to find your LS 3.2 program location.
Only the add/remove feature in the control panel is missing - but who wants to uninstall Lightscape?
