to save the script to your computer coppy script to notepad (windows not blender).  save scrip under .blender-scripts-  then library.py  

make sure while saving it that no encoding is selected and its not a .txt type file.

yes, this script works in 2.42a, infact it even works in the current cvs.  

to access the script make a new blender window, set the type to scripts, and click scripts and open object-"Blender Library".  then the rest is pretty simple.  

after a couple weeks in blender you will learn modeling in blender is far superior to wings. there is a panel for all the tools as well as hotkeys and its much more stable as well as efficient and userfriendly