If it's a genuine Windows 2000 installation CD, it will be bootable. You will probably need to alter the drive boot sequence in the BIOS. Usual default boot sequence is floppy first, than first hard drive. Alter this so CD-ROM boots first. During the installation process it will ask you where you want to place the system files. It is at this point you can select deletion of partition(s), format type etc.
Hope that helps...
ROGER - G0AOZ.