The solution may depend on what tasks you wish to schedule. For some things,
you might want to look into learning about Group Policies - where you can
create custom scripts that are executed at logoff/logonn, computer
startup/shutdown, etc.

As you may have discovered the GUI Scheduled Task Wizard only works for the
local computer. It does NOT allow you to centralize schedule tasks from one
place for use to workstations across the network.

On the other hand, Windows also comes with the very non-GUI 'AT' batch
scheduler command which does work across the network and allows you a
central point of control and configuration. The Windows 'AT' implementation
is a direct take off from the long time Unix 'AT' scheduler.

Here's a starter link:
http://www.microsoft.com/technet/treeview/default.asp?url=/technet/prodtechnol/w
indows2000serv/maintain/operate/04w2kadb.asp

(Watch out for link wrap)

If it doesn't work, go to Microsoft's Technet, and drill down: Products &
TEchnoligies > Windows 2000 Server > Maintain > Operate > Scheduling Tasks

-kw

Assuming the workstations are NT/Win2K/XP Pro, they each have their own
Scheduled Tasks capability.

Alternatively, you'd might be able to write distributed application
code to do remote execution if that's appropriate for the jobs you're
trying to carry out.