Hexagonal modellers have to live in a world dominated by a rectangular mindset - and it can be necessary to use rectangular modelling tools.
Fortunately, there is a simple isomorphism between the hexagonal grid and the rectangular one.
The following Java applet is intended to demonstrate this mapping, by providing a visual representation that morphs from a hexagonal grid to a rectangular one, and back again.
Drag the slider on the right to morph between hexagonal and rectangular styles.
The applet should be fairly self-explanatory - after examining it you should be able to generate hexagonal models using rectangualr tools.
Sometimes an "interlaced" mode is used - with alternating rows being moved in opposite directions.
Note that a similar mapping is available for those working with triangular grids.