Recently I created a gentoo ebuild for the 0.4 version of the KDE 4.3 service menu manager (http://www.kde-apps.org/content/show.php/Service+Menu+Manager?content=94996):
# Copyright 1999-2008 Gentoo Foundation
# Author Phillip Merensky
# Distributed under the terms of the GNU General Public License v2
EAPI="2"
inherit kde4-base
DESCRIPTION="This app is a System Settings module to manage service menus."
HOME_PAGE="http://www.kde-look.org/content/show.php/Service+Menu+Manager?content=94996"
KEYWORDS="amd64 x86"
IUSE=""
SRC_URI="http://linux.wuertz.org/dists/sid/main/source/kcm-servicemenus_${PV}.tar.gz"
SLOT="4.3"
DEPEND="kde-base/kdelibs:${SLOT}"
S="${WORKDIR}/kcm-servicemenu"
src_unpack() {
unpack ${A}
cd "${S}_build"
}
src_compile() {
S="${WORKDIR}/kcm-servicemenu_build"
cd "$S"
emake || die "Make failed!"
}
Save it as service-menu-manager-0.4.ebuild in your favorite category (I prefer kde-misc) in your custom overlay, execute
ebuild service-menu-manager-0.4.ebuild digest
and emerge it.