Almost. How big (what capacity has) is your hard disk?
In big steps: create partitions, format partitions, install operating system. These might be different for different windows version. All you have to do, is to read carrefully what the program tells you and when you don't know what to do (this is at the begin ussually) ask a friend.
You have Windows 98 and windows 2000. What computer do you have? (processor, memory, hard disk capacity)