I had this problem before, and what I did was use IconDeveloper to extract the images from the .icl file. Open IconDeveloper, go to file, batch processing and then extract icons from a collection to a folder. Select the .icl file you want extracted and click open. You then will be asked to chose where you want the extracted files located. I save them in the same folder where the .icl file is. Then I move the whole folder to the IconPackager folder, which you should be able to find under users, public, Stardock, Iconpackager. It should then show up as one of the icon packages when you open IconPackager. I hope this helps.
