So apparently I got it working by using an USB mouse. Yay!
But I had another problem. It stops at 1/4 of the installation during the 14 minutes remaining mark, saying that the Essentials.pkg could not be extracted. I've searched around and it seems like it's probably a bad RAM module, but some people got it working with specific flags for their computer. Apparently all the flags used gives me a kernel panic. It probably is my RAM module since it's 3 years old already and from a generic local brand. I ran memtest86 and threw me a couple of errors, too.