any opaque installer that asks for a password, you might want to take the pause that refreshes and square yourself to capture what was done. a technique...
quit apps that may be changing files. we want as few files mod'd as possible.
before running the installer, in the shell:
% touch ~/newer
then, run your installer. when it has completed, in the shell...
% sudo /usr/bin/find / -xdev -newer ~/newer
this will spit up all files changed since the above touch.
you might want to capture it by redirecting to a file...
% sudo /usr/bin/find / -xdev -newer ~/newer >~/install.foo.touched.log
note that there may be some files in there that were modified, but not by the installer.