Hi mappers this is Kasami!
Here is my explanation for the use of func_train and path_corner!
So you create your own over two floors controled elevator 
or in any direction moving something : )
The direction the plat moves depends on where you place 
the path_corners! With the yellow buttons can you call 
for the plat and the gray ones will start
the ride(you should be on the plat already)!
I put three files in the *.zip file like in any other 
*.zip file of mine. The *.bsp,*.map and the readme file. 
To see how it works check the *.bsp file out!
If you need any exact information just check the *.map file out 
and see how i did the settings!
If you got any questions or better ideas 
just feel free to contact me by E-Mail. "wolle@netmdc.com"
Cya