I have a relatively new Imac (former PC user wondering why I didn't switch years ago) and, don't ask me how but, Safari was accidentally trashed...not showing under applications. I am running OS X 10.5.4. Is this an app that I need to install from the operating disc? If so, do I need to reinstall everything or can I just install Safari itself. I have tried an install of the program from the apple site without success (message reads that it will not load to my hard drive). Appreciate any advice...thanks.