How can I access a specific part of my volumes directory?
When you open the 'Finder' application - in the sidebar there is probably an install disk that you can eject (has an eject icon next to the name).

You can also open the 'Terminal' program and type in cd /Volumes/ and then ls -la. This gives you a listing of what is in that directory. If it's not in there, you have probably already ejected the install disk.

Also - I've looked at the 'Bundalore' program you describe and found a adware removal guide. This goes through every step of finding and removing it. The Safe Mac: Bundlore

Hope this helps!