A HTPC is just like any computer, so we will not lay out the installation of components like hard drives and video cards. We will however detail the water cooling portion, which may be a tad tricky for the novice.
The TT Aquarius comes with a pump, backup reservoir, radiator with fan, water block, hoses, clamps and screws:
Before installing, remove your motherboard from your case if needed. Un-install the P4 bracket from the mobo by pushing in the pins from the back.
Place H-shaped foam on the back of the motherboard. Line it up using the holes that are pre-punched. Then place one of the metal H pieces over it and run the 4 long screws through the holes.
Flip the motherboard around and spin one plastic washer and a nut down the screw.
Apply some thermal grease on your CPU and place the water block on it. Depending on your CPU, the orientation of the water block may be different.
Place the second metal H piece over the top and slide it down the screws over the block. Screw the metal brace down with the remaining nuts and you should be set.
Install the motherboard into the case. The Aquarius kit uses strong magnets to hold the pump, radiator and backup res in place. These do not cause any interference with the computer components as far as I know. Pry three of them off and place them on the pump and stick your pump on the bottom of the case.
Place the radiator near the front of the case using the same circular magnets.
The backup res goes on the back of the case with magnets also:
Some spiral metal springs were included that you could use to prevent kinks in the tubing. It wasn't used in this project because the case was not large enough to cause tubes to bend. Attach the clamps onto the tubes before you twist it on the pump, radiator, backup res and water block. Mix water (distilled preferred) and the water coolant that is included. Pour it into the backup res until the water level stops dropping. Once that happens, you are ready to turn it on. Here is how our setup went:
Initial testing after installation of the other components showed good temperatures for this setup. The CPU fan speed is from the pump and the System Fan is the radiator.