Select the cell or range of cells using one of the methods above.
Move the mouse pointer to the start of the next range or single cell.
Hold down the Control key and click or click-and-drag to select a range.
Repeat as necessary.
In OOo v2.0 when you are selecting non-contiguous cells, the first part of your set doesnothave to be multiple cells. In OOo 1.x you had to select more than one cell as the first part of a non-contiguous range.