2 photshop files shown as "in use by another application" - can't delete or open
I have 2 files, one a psd and a pdf generated from the psd. They are fairly large files (44 MB). I tried to move them to another folder and I got a message that says and/or "File in use by Mac OSX with the warning that the action could damage the functioning of said app. I tried to open the files via Photoshop, and got in one case a message saying end of file reached unexpectedly and on the other "damaged file" When I tried to delete, the message "file in use by another application". Permissions were somehow noted as custom, changed to read and write.
Don't know exactly when last opened files, about 1 month ago. Just updated recently. I can let the files go as I have iPhoto originals and can recreate finished image, just want to dump them or use them.
Please help!
Thanks
PS: Running Leopard on a Macbook Pro intel 17" 2009(?)
Work: MackBook Pro intel 17", Quicksilver 733 MHz 10.4.11,, Mac OS X (10.5.6), MacBook Pro 15" intel 10.4.11, iMac G3, iPod nano, Canon S60