When you press Start / Documents, Windows 2000 is really displaying the contents of your %UserProfile%\Recent folder. This folder contains shortcuts to recently visited non-program files. By default, Windows 2000 displays the 15 most recent shortcuts.
You can either implement the Maximum number of recent documents policy at
User Configuration\Administrative Templates\Windows Components\Windows Explorer
or, if the policy is Not Configured, use
Regedt32 to navigate to:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
On the Edit menu, Add Value name MaxRecentDocs, as a REG_DWORD data type. Set the data value, using the Decimal Radix, to the number you want to display. The range is 0 - 4294967295.