On Sun, 9 Sep 2012 15:46:45 -0400, Hajj Ali <[log in to unmask]> wrote:
[...]
>I have another question: How do you delete Classic applications. It
>seems they do not want to go into the trash and if some make it there I
>could not empty the trash and it says it is in use!!!
>
You can hold the alt key while emptying Trash. This should force empty Trash.

Also, there is an app, PowerPC to Trash, which identifies all PPC apps and allows you to move them to Trash or another location:
http://brilorsoftware.com/ppctotrash.htm

Hamid