To load the Gantt Chart add-in

After saving the file on the hard disk, unzip the GanttChart.zip file.  Save the GanttChart.xla and the GanttChart.chm files in a convenient directory.

Run Excel and load the add-in by selecting Tools | Add-ins... (see Figure 3)

Figure 3

Click the Browse... button (see Figure 4), and locate and open the GanttChart.xla file saved in the previous step.  Ensure that the checkbox next to the Gantt (Project) Chart entry is checked.

Figure 4

When the Gantt Chart add-in first loads it displays the following dialog as an alert that it is running:

Figure 5

The Gantt Chart add-in is now available for use.