I downloaded this little program (Dellater) found here:
http://www.diamondcs.com.au/index.php?page=dellater
and it seems that only by using it it's possible to delete files or folders that are in use.
I tried the program, some have try it too and i don't see how it is working.
I was reading the instructions again on the web site but i need more info about it, please if you use this software can you reply to this thread with more information.
Thanks for your time.
Note: Actually when i open the program i don't need to delete anything, maybe i should wait and use it only when i have a message about the file that i want to delete is actually in use and see if it's working ???