ONE: Register a mime type in the kfm browser
Click on your home directory icon
edit->mime types (or edit global
mime types if su)
A mimelink panel will appear.
In the General tab
rename it appropriately (doom.kdelnk)
the binding tab
1) pattern = *.wad
2) mime type = application/doom
The word application, and the word doom, are not of themselves significant. As a cominbed word however, application/doom will be one of the choices you can use later when creating the application kdelnk file.
3) change icon to something
suitable by clicking on the icon image in the
Icons are located in EITHER
Icons as such must be saved as (dot)xpm extensions for you to access them in one of these two folders. You can use Gimp to transform something suitable and place it in one of the above folders.
4) PRESS OK, you're done.