DIY EDIT:
Tools needed: 12mm Deep socket. Extension, Power Drill, 5/16 drill bit, Tiny Arms.
Preface: If you're somewhat big, two bits of advice: Remove the dead pedal for a little more room, and/or remove the driver's seat. I did neither of these and cursed my way through trying to contort my big-ass self under the dash.
1. Contort under the dash, and look up. There's the clutch pedal. First, disconnect the 2 electrical connections. If the front connection is a little difficult, you can remove the entire assembly by turning it and it will release. Just to be safe, try and remove the connection itself though, it slides off easily. Disconnect the clip attaching the hood release cable (or just cut through the orange tape that connects it)

2. The bracket is held on by 3 metal 12mm nuts, and one plastic nut. I tried, but couldn't get a picture of the third hidden secret nut, though.


3. Now, take your assembly to a work area. You'll need to break out the drill. As shown, put the brackets in place (it's pretty easy to figure out how they go, even if my pics aren't perfect) and secure with the provided guide bolts (the long ones), and drill using the long support bracket as a guide.

4. Now, bolt everything together using the 3 supplied 13mm lock nuts and bolts. Once again, it's obvious which bolts go where. Remove the 2 guide bolts.

5. Now, bolt the sucker back up to the car (easiest if you loosely thread the top bolt, then slide the assembly towards the firewall. You may have to wedge a brace behind the master cylinder recess on the firewall in the engine bay. I did. When reinstalling, make sure the clutch slave rod is positioned into the master cylinder recess properly.
6.Reinstall the two electrical connectors and verify they click during installation.
Use the supplied wire tie to secure the hood release cable to the pedal assembly using the 3/16 hole you previously drilled and snip off the excess wire tie.
7. Verify all of your bolts and nuts are tight and there is no interference in the pedal assembly from bolts, wires, wire ties etc.
8. You're done. Hopefully your arms aren't as chewed up as mine. I look like a fought a cat. I've also attached the Mazsport PDF instructions as well. Their pictures are a little better and instructions probably include things I forgot.