The version 0.4.2 version is for Simutrans version 100 and newer. The download ist here in the german forum.
http://www.simutrans-forum.de/forum/thread.php?postid=34804#post34804
New to version 0.4.2
* At least 12 new homes
* At least 2 new commercial buildings
* At least 4 new industrial areas
* 4 new factories and shops
* New menu system (please thorough test on usability)
* Diesel filling station (platform)
* Interlocking / stabling (platform)
* Street Railways (test)
* Paint rocky climate change
* Many Spanish translations (thanks vilvoh)
* Many English translations
* And provides even more what I forgot