No representations are made about the suitability of this software for any purpose. It may be required to set the papersize to suit the printer you intend to send output to. The program currently sets up the page to be the smaller of A4 and US letter in each direction, which should allow printing on most printers, but you may wish to set it to the exact local size. In addition, the margins the program will print out to are quite narrow, and may need to be widened.
Type make at the prompt.
The compiled program is called reticulate. You can compile and run a modified version of reticulate. Unfortunately, you won't be able to see the matrices on screen. Instead of removing the above lines, you need to edit them to include the package, however it works. Basically the idea is to generate a square window, the size of the number of cladistically informative sites, and make all co-ordinates corresponding to the letter 'm' in the compatibility matrix black, the rest should be left white.