If you are adamant about installing Linux, I recommend the following:
First, I would download and burn onto a CD a copy of Finnix or RIP Linux to use as a rescueCD. These two Linux distros can boot up in text mode. Once you have either of the rescueCDs, test and see if either or both can boot up on your computer - make sure to boot up in text mode - RIP Linux can boot up in both text and graphics mode.
If you are able to boot up the rescueCDs in text mode, I would then try to install a Linux distro in text mode. Yes, Slackware64 failed for you, but you can install other distros in text mode. I would try Ubuntu, Fedora, or Debian - in that order. You might even try Slackware 32 bit 13.1.
Here is one link
you can follow to do a text mode install of Ubuntu. You can follow this guide for the most part, but do NOT
execute the line sudo service gdm start or the line right above it
. Just run
Once you reboot, log back in and run sudo apt-get install xorg xterm fluxbox
. Then reboot, log back in (your computer should still boot up and bring up the login screen in text mode), and run
# startx (don't type the '#' - it's just the prompt sign representing that you're root user at the command prompt)
If you're not able to get into graphics mode this way, come back and post in detail the commands you executed and their corresponding error messages.
You may want to practice the text mode install under vmware or virtualbox before trying the real install.