File cleaning question

Hi - form my  "My Windows" screen I am looking over files to clean out and came across a gigantic list of "Tool copy" (WAV) files such as "Tool Copy of take 3"  which is a WAV file and several other "takes" like this and their dates are somewhat old. I am not certain if these "Tool Copies" which if I recall represent edited copies of clips are actaully still part of a finished project - or if they can go??? I can listen to them (they have the Real Player icon on each). 
 
Just below this list is another huge list of "Tool Copy..and then several digits...which are WOV files / Pict cache. Can these go ????
 
Thanks

In my experience the "Tool Copy..." files are from CoolEdit2000.  CoolEdit was from Syntrillium which was bought by Adobe quite a few years ago.  CoolEdit resurfaced, presumably in a more wonderful form, as Adobe Audition.  I still use CoolEdit so I don't know but Audition might also use the "Tool Copy...." names. 

I was amazed recently to see that some of my SHS7 projects were referencing Tool Copy... files.  That never happened with PA9.

In any case, as Cj says, CWAF is the way to find what is referenced and not referenced.
And the WOV files in the picture cache can be deleted whenever you want.
You do want to make sure that CWAF can find all your projects and the relevant WAV files.  Otherwise you might come up with a lot of orphaned and/or missing files when they actually are not.

--Larry