For Windows users, there is now available Simutrans-Experimental-Complete (download here (https://github.com/downloads/jamespetts/simutrans-pak128.britain/Simutrans-Experimental-Complete.zip)), containing a .zip file with all the executables, configuration and pakset files necessary to run Simutrans-Experimental all laid out in the correct folders: just download the .zip file, extract the contents to a suitable directory, and run Simutrans-Experimental.exe from there.
This version contains Simutrans-Experimental 9.3 and Pak128.Britain-Ex 0.8.