One other suggestion would be to use Osiris Host Integrity system. It MD5 hashes whatever directorys and file types (.EXE, DLL, etc) you want and will alert you to changes (adds, deletes, chgs to hash, etc).

All you do is setup the server/management portion on one box and install the agent on your test machine and add the test machine to the list of hosts to monitor inside the app. I use it at work and it is very nice.

http://osiris.shmoo.com/