Q: How to install leopard on a 10.4 correctly

First back up tour computer, put in the install disc and follow the prompts, it will tell you what to do.

First, you have to determine if your system is capable of running Snow Leopard.

General requirements

• Mac computer with an Intel processor
• 1GB of memory (make that 2 GB minimum)
• 5GB of available disk space (more like 30 GB)
• DVD drive for installation
• Some features require a compatible Internet service provider; fees may apply.
• Some features require Apple’s MobileMe service; fees and terms apply.

If you don't have a compatible system, you can't install it.

If your system is compatible, the next thing to do is verify that all your current applications will run on Snow Leopard without needing a paid upgrade; if they require you to pay for an upgrade, it could cost you a lot of money, depending on which applications need it, and how many you have.

If you make it past those hurdles, backup your entire drive externally, insert the Snow Leopard disc into your DVD drive and restart while holding down the 'C' key until you see the Apple logo appear. Then follow the simple instructions and wait for it to finish.