I figure you have solved the problem by now, but I'm posting just in case if anyone stumbles along this thread in the future. This is for Microsoft Excel 2007.
1. Change chart type to "Line with markers".
2. Right-click on your series in the chart and "Format data series".
3. Marker options: Built-in
4. Marker fill: Automatic
5. Line color: No line
6. Marker line color: Automatic
This will eliminate the line, but keep the markers like a scatterplot. The axes will retain the text labels so you don't have to manually draw a figure. Hope this helps.