My advice is to give useful information when you ask for help. You have given no information about your version of MacOS X 10.0. You have given no information about the computer that you want to install it on.
Be warned: You cannot install an OS on a computer that shipped with a newer OS. For example, if your machine shipped with MacOS X 10.1.3, you cannot install any version of MacOS X 10.0 or any version of MacOS X 10.1 older than MacOS X 10.1.3. You also have hardware issues. You should have at a rock bottom minimum 256 MB RAM and 6 GB HD. Much more is recommended.
With no information about your computer, this is the best I can do.
There are also firmware updates that might need to be applied to the Mac before OS X is installed. Since you didn't specify the type of Mac, you'll have to check at the link below for yourself: