This guide is for advanced users; you don't need to be a developer but you should understand how your file system works and a bit about the command line.

You will need two downloads:

http://xml.apache.org/xalan-j/
http://xmlgraphics.apache.org/batik/

Xalan is used to turn the map.xml and map.xslt files into a map.svg file for viewing. Batik turns the SVG file into a PNG file for sharing.

Extract both of these downloads to their own folders somewhere next to each other. Assuming you put them in My Documents, you could set up a script like this:

@echo off
cd xalan
java -jar xalan.jar -OUT map.svg -IN https://raw.github.com/hpoom/Nether-Roads-Map/master/map.xml -XSL https://raw.github.com/hpoom/Nether-Roads-Map/master/map.xslt
cd ..\batik
java -jar batik-rasterizer.jar -d .. ..\xalan\map.svg
cd ..
start map.png

Note that you may need to change "xalan" and "batik" to folders that match where you extracted the files. If there are any errors the file may not be produced and may not look right at all.

Now you can have an up-to-date map instantly whenever you want!