Yeah, what Funhacker says is the easier way, on the run after opening, Create a batch file to delete files.
Code:
cd FOLDERNAME\DestinationName\
deltree if you are deleting a whole folder, del if you are deleting a file.
exit
So lets say you want to delete sound\1004.wav
and
music\1000-1.mp3
Your .bat should look like this
Code:
cd \sound
del 1004.wav
cd ..\music
del 1000-1.mp3
cd ..\
del delete.bat
exit
This will delete those files along with the .bat file you made.
Another way you can go about deleting mass files, Like debug logs in the client, is by using wild cards.
Code:
cd debug
del *.txt
del *.log
cd ..\
del delete.bat
Now to make a bat file, you just use text file and rename it from
New Document.txt
to
BLAHBLAH.bat
(in this example i renamed it to delete.bat)
Then you set it up in winrar to run before or after the patch has run.