hi there,
AFAIK slack 9.1 uses flux 0.1 series. As Pat V (Changelog) wrote and also as it is written in
www.fluxbox.org this version is old and unmaitained.
probably you won't get all the ressources of your theme running it under flux 0.1X ..
the question number one i didn't get.
the question number 2 is fluxbox dependent. it is nothing to do with slackware
the question number three is called chown.
regards
slackie1000