You need a bootable disc with drive utilities. Since you still have OS 9, it is trivial to make a disc assuming you have a burner on the Mac. This MacOSXHint seems to cover everything you need.

If you don't have Toast, or a burner on OS 9, use Disk Copy to create an image, then format it Mac OS Standard per the link above. That image might be burnable in a Windows machine. I was able to use the OS X Disk Copy program to make a CD Image, then later burn it with Nero.

edit - Sorry, forgot your actual question of copying the drive. It should just involve installing the new one, formatting it and "blessing" it (aka in Drive Setup, insure you check "Install Mac OS Drivers" or some such), then dragging and dropping the files from one drive to another. Using a boot CD will be the best way to ensure the drives are duplicated exactly, as none of the system files will be in use on the drive.