Step 1: Download the required .deb from the source site here.
Step 2: Open a terminal app on your device or through SSH, and then type the following:
apt-get install mobilesubstrate
Step 3: Next, load the .deb file onto your device in /var/mobile via WinSCP (Windows) or Cyberduck (Mac), before entering:
dpkg -i com.alpden.3denabler_1.0_iphoneos-arm.deb
Step 4: Ensure you respiring (or, to be safe, reboot) in order for the changes to take effect.