Wow.. what a useless answer. Step one is LITTERALLY "Make a image using OSD". And then it links to the document he links above.
I have also followed these instructions line by line and they simply don't work. I actually know the problem he is having and know how to fix it. You have to edit the script manually and change the drive letters from I: and H: to anything else. For some reason LANDesk makes scripts that aren't functional. I really am not sure why. After you make those changes, then the imagew tool comes up, but it only creates a file that is 4,736KB and never takes an image. Doesn't matter what drive you select in the drop down, the same thing happens.
Would be nice if your documentation actually worked.