Cheers everyone.

@Katto: The process was to download the DEM data from the USGS site. The total area came split in 4 parts. I loaded each part into Fractal Terrains and exported them as .bmp files. Brought these into photoshop and stitched them together and cropped them (could have done that in Drawplus now I come to think of it). Then I took the resulting image into Drawplus and put in all the labels, roads etc.