3D Spotlight has posted a Windows 2000 services tweak guide. Here a clip:

These are the 3 choices that face you for each particular service available. What´s the difference between each 3 options ? Well.

Disabled - The service is not automatically started when you load Windows 2000. If needed it cannot be started either until you reset the Startup Type to Automatic/Manual & reboot.

Automatic - The service is automatically started when you load Windows 2000.

Manual - The service is not automatically started when you load Windows 2000. Although it can be loaded if/when it is needed.

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