Run the installer and watch it with Sysinternals Process Monitor. Vous pouvez filter the data so that only operations done by the installer are shown. Vous pouvez even filter down to whatever operations you want to see (RegWrite, RegQueryValue, etc) and save the capture for later viewing.
Process monitor is freeware.
You could also use WinDiff. Vous pouvez save exported registry files and then compare them afterwards:
WinDiff is free and open source.
Another FOSS solution for comparing actual registry exported files is RegShot.
RegShot is a small registry compare
utility that allows you to quickly
take a snapshot of your registry and
then compare it with a second one -
done after doing system changes or
installing a new software product. The
changes report can be produced in text
or HTML format and contains a list of
all modifications that have taken
place between snapshot1 and
snapshot2.De plus, vous pouvez also
specify folders (with sub filders) to
be scanned for changes aussi.