If you need to modify the scheduled job you then need to go into the Enterprise Manager, locate the instance and then Management, SQL Server Agent (needs to be running!), then Jobs and you will see the job that you scheduled earlier. You can modify (or delete) it by right-clicking and selecting properties. You can modify the DTS job or change the schedule using the different tabs. A useful one is configuring notification to do a Net Send on success/failure of the job in the Notifications tab.
Hope this is of use.
B,
Galway,Ireland