I could be wrong, but it seems I have had this issue before and if you change the .ip extension to .zip, then extract, you get a folder full of icons that you can place into the default icon directory (in Public Documents/Stardock/IconPackager and you'll have working package.
I could be wrong. Going on memory.
If you change the .ip extension to .zip, then extract, you get a folder full of icons that you can place into the default icon directory (in Public Documents/Stardock/IconPackager and you'll have working package.
Correct (in most cases) 
Although this may work, I must remind everyone that the numbered location of the icons in the iconpackage is critical so as to replace the correct icon it was designed to replace when applying the package.
