Use Process Monitor.. create a filter on "Category" is "Write" and record the setup of the programs..
at the end you will see all the copied file to the system and all the registry key created..
Autoruns only can show the content of a selected numbers of registry key which have a sense if you are looking for something harmful in your PC.. but to totally understand what's going on, Process Monitor is the tool to use..
To mention someone a lot better than me, "When you are in doubt run procmon.."
HTH
-mario