Batch tiling

youknowho

I want to batch tile (and convert into PNG) SRTM3 images but haven't been able to yet in Global Mapper. I've used the Export Raster and Elevation Data option, and on the Gridding tab tried both "No Grid" which gives me one image for all of the images loaded, and specified the number of rows and columns but this tiles all loaded data as well.

How do I batch tile each SRTM3 image into 4 smaller parts?

Using Global Mapper version 7.04. Thanks!