First of all, slackware 9.1 comes with Fluxbox on the disk. But if you want to install a newer version, then install slackware, go into KDE, and then download this file.
http://fluxbox.bottino.com/files/9.1....14-i386-1.tgz
Then, open up a terminal, go to the directory that you saved this file in, and then type:
Code:
su
upgradepkg fluxbox-0.1.14-i386-1.tgz
exit
and then exit X windows, and type this at the command line:
Then just select "fluxbox" from the menu, and then type "startx";