Ok, I got my keyboard and mouse back! I suppose it wasn't really wise of me to follow the instructions given on the Archbang wiki, everything worked perfectly with the Arch wiki on chroot. I wrote down the alternative method suggested here though, I'm sure I'll find it useful some time soon. Anyway, thank you all very much. Now, I was getting an insanely flickering screen with the nouveau drivers, so decided to switch back to the proprietary ones. The problem that I'm facing now is that I get an error message saying "No screens found". Is there anything I can about this? I looked around but didn't find a solution.
