Frostwire as an example...


In slackbuild for icon:

mkdir -p $PKG/usr/share/icewm
mkdir -p $PKG/usr/share/icewm/icons
cp $CWD/frostwire_16.png  $PKG/usr/share/icewm/icons/frostwire.png


In slackbuild for Absolute_Note:
mkdir -p $PKG/usr/doc/$PKGNAM-$VERSION/Absolute_Note
cp -r $CWD/absolute_note/* $PKG/usr/doc/$PKGNAM-$VERSION/Absolute_Note



In install/doinst.sh:

addiceitem "Internet Apps" frostwire frostwire Frostwire >/dev/null 2>&1

# first passed variable is menu SECTION
# second is PROG NAME
# third is ICON NAME
# fourth is MENU ITEM NAME
#
# example usage:
# addiceitem Graphics xnview pictureview Xnview
# (put "" marks around any multiple-word name)