Ok, I loaded the firmware-radeon first then the rest of the modules and didn't get any errors, but when I tried to load X11 with the
startx command the screen just went black for a second and it kicked me back to the shell, running
grep EE /var/log/Xorg.0.log gave me this:

About the illegal instruction, I am running an Athlon XP K7, maybe it is missing an instruction that Xorg or Mesa needs?