Previously, I had OS X Beta on my iMac DV Special Edition/400 MHz. Since I didn't use it all that often, I recently tried to delete it, following the instructions in Mac Addict magazine. However, there were some parts of he Beta which refused to be deleted, saying stuff like 'OS X cannot be put in the Trash.' After re-formatting (and re-partitioning) my hard drive, I was able to delete more of OS X Beta. However, such things as the Core Services folder still refuse to be trashed, even though the folder is now empty as I was able to delete/trash items in that folder individually. I now understand that I missed the deadline date for 'easily un-installing OS X Beta.' If I buy OS X & install it, will a new Core Services folder over-write/delete/replace the stubborn Beta one, and will I then be able to empty the Trash and bid the old folder good riddance?
Thank you in advance for any assistance with this.

Thank you in advance for any assistance with this.
