i have the same web cam on asus f3jr. installation works and driver too but some problems on my webcam like contrast.... try this installation method.
as root do this:
#mkdir -p /usr/local/portage/dev-util/ctags
#mkdir -p /usr/local/portage/media-video/stk11xx
#cd /usr/local/portage/media-video/stk11xx
download here the files
stk11xx-1.0.0-ctags.patch
and
stk11xx-1.0.0.ebuild (working ebuild)
from
http://bugs.gentoo.org/show_bug.cgi?id=178946 page
so
always as root do this
edit your /etc/make.conf adding this line:
PORTDIR_OVERLAY="/usr/local/portage"
then
in the directory /usr/local/portage/media-video/stk11xx
create a directory called files
#mkdir -p /usr/local/portage/media-video/stk11xx/files
cp stk11xx-1.0.0-ctags.patch /usr/local/portage/media-video/stk11xx/files
#ebuild stk11xx-1.0.0.ebuild digest
#emerge -pv stk11xx
so try your webcam!!!
hope it helps
zalut
mebitek