open the drawer where you installed the programs, and then click and hold the right mouse button. The menus appear, and you should select Window and then Show All.
Drawers and files only show up in workbench if there is an info-file together with the file.
Example, starburst.jpg won't show up in wb, but if you had a startburst.jpg.info it would have shown up.
The info file has information about the file itself. If you find one, do the same procedure outlined above but go into Icon and then Information and you'll understand how it works, I think.
Good luck with your XL
