You can add icon packs right from the home screen. Just click on the wrench icon
Then select the "Import iconpack..." option. This will open a file selector window in which you can locate the icon pack you want to load. A Touch Portal icon pack has the .tpi extension.
When you have selected the icon pack file you will receive this message that is has been imported. So from now on you will be able to select icons from this icon pack when you select to add an image file to a button.
When you want to add an icon to a button using the icon pack dialog you can also add an icon pack file
Click on the "Add Pack" button to open the file selector dialog and search for the desired .tpi icon pack file.
When you have selected the icon pack file you will receive this message that is has been imported. So from now on you will be able to select icons from this icon pack when you select to add an image file to a button.