Well i reinstalled my slackware, since i messed up the kernel, because i tried to reconfigure it, and i didnt wanna have any problems. When i started up i realized it was always boring to have the same KDE desktop looking the way it looks, so i wanna install 3ddesktop but for some reason i cant, it says im missing some development library called Imlib2 and someone told me to use Mesa GLU too. i didnt find anything, and i really dont get it, i dont know where to get Imlib2 either, and im going nuts here, because i really want it to look badass, if someone can guide me through, id really appreciate

Almost everything can be found listed at freshmeat.net.

For Imlib2:

http://freshmeat.net/projects/imlib2/

I'm not sure about Mesa GLU, but you may want to check the mesa site at mesa3d.org. This is also linked to from freshmeat:

http://freshmeat.net/projects/mesa/

You may not even need the Mesa GLU libraries as I'm pretty sure Slackware comes with them. I'd try installing without Mesa, and then compiling Mesa only if necessary.