Recently purchased my first mac (MBP), currently its running Tiger and I'll be installing Leopard as soon as it comes in. In the PC world, I was running a program to remove temporary files, i.e.: internet files, cookies, and just general temp files that can be deleted. I was using the program CCleaner (ccleaner.com). Also was used to defragmenting the hard drive. On the mac is any of this possible or necessary. (Location of temp files, programs to use, and just general file maintenance on the mac)? Thanks guys. Also are any virus or spyware programs needed?